Sunday, December 7, 2014
Decisions, Decisions...
This week I had a really hard time deciding on an article for you to read. So, I decided to let you choose. I will give you four links to different articles from Smithsonian.com. You need to read the article and write a 4 to 5 sentence summary of what you read. The choices are....
If you find another article about cells, cell shape and function, mitochondrial disorders or any other topic that is relevant to what we are studying now. Send me an email and I can add it to the list for this week.
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My Article is from: http://www.smithsonianmag.com/science-nature/why-does-very-hot-water-sometimes-feel-cold-180953532/?no-ist
ReplyDeleteThis article is about scientists trying to explain why we get a paradoxical cold sensation after being extremly hot. For instance if you step into a hot shower and feel a sudden cold pain, one theory is that paradoxical cold is a malfunction of the thermoreceptor system. Scientist believe that pain receptors in our nerves that respond to potentially harmful heat levels coexist on the same sensory fibers as cold thermoreceptors. Others say that cold receptors can be recruited to help the brain sense potentially harmful temperatures at both hot and cold extremes, therefore our cold receptors work double-duty. But until sufficient research is found to back up these theories, the topic of paradoxical sensations will remain a debate among the scientific community.
I don’t think this has ever happened to me, but it’s amazing how the brain may sense potentially harmful temperatures at BOTH hot and cold extremes with the pain receptors in our nerves.
DeleteThis happens to me all the time when I first step in. Sometimes the water must be way too hot because the sensation can sting for a little bit. I wonder what you can do to help undo the malfunction or will it always be that way?
DeleteI have not experienced this, and I really hope I never will, as I don't ever plan on touching boiling water. But I really am interested because of this, and hopefully curiosity does not make me want to stick my hand in the water next time I make pasta.
DeleteThis is so cool. I have always wondered this and I'm glad I finally found out why!
DeleteI chose to read the article about why hot water sometimes feels very cold. It talks about how we have receptors underneath our skin and how they sense temperatures and send a signal to our brain. They think that the paradox cold is caused by malfunctions by the receptors.
ReplyDeleteWow that is very interesting and cool. It is also a bit frightening to think that a malfunction of our receptors is normal to us. Additionally, it raises the question of what if there are other receptor malfunctionings that we are unaware of.
DeleteThats cool. I always wondered why that happens. Hopefully none of these receptor malfunctions effect our health negetively.
DeleteI read the article was Scientists Have Basically No Idea How Many Cells Are in the Human Body. It talked about how there are loads of things that we are still in the dark about as far as the human body. For example how we truly don't have a great idea of how many blood cells we have. There is a range of 5 to 175 trillion blood cells. It also talks about how even factoring in different body sizes the amount of blood cells in the human body is just an uncertainty.
DeleteI also read a bit of this article and I thought it was cool how we have receptors that sense temperatures.
DeleteParadoxical cold is the reason why really hot water feels cold. The human body senses temperature changes through thermoreceptors, there are cold and hot receptors. Outside of the temperature range of 60-113 degrees fahrenheit, the temperature causes a sensation of pain. However over 113 degrees fahrenheit the cold receptors can act, this is called paradoxical cold, and is why hot water can feel cold. Scientists have no clue what is the cause of this, but a popular theory is that paradoxical cold is a malfunction of the thermoreceptor system.
ReplyDeleteThat's a new way to look at that, I didn't think of it that way
DeleteI read that article to and I also read about paradoxical cold and how it was a malfunction and I thought that was pretty cool.
DeleteThe article I read was "Why Does Very Hot Water Sometimes Feel Cold?". I always wondered this and now I finally get an answer! There are special nerves called thermoceptors then are just beneath the skin. They are all over the body and they send information about temperature to the brain. These receptors have different ranges in temperature. There are both hot and cold receptors that are triggered by different things. Scientist found that when the temperature is higher than 113°F, in some cases it can trigger the cold receptors. It's called paradoxical cold and scientist have been confused by it decades. Right now there are a bunch of theories but there is not one set in stone answer about why or how this occurs. This article was really interesting and answered many questions that I had.
ReplyDeleteI read that article too and found it so cool!
DeleteI read Human Skin Can Detect Odors, Some of Which May Help Trigger Healing. This article talked about how the body has olfactory cells in more places than just the nose. The olfactory sensors in skin can actually be affected by different scents. A study took these olfactory cells and exposed them to different sandalwood odors. Sandalwood is said to be a healing agent, and the cells did react to some of the scents. 4 out of the 11 scents tested produced results in the cells that were similar to what might happen in the healing process of an injury. Still, skin olfactory receptors are not as good at picking up scents, but may be just as important.
ReplyDeleteThis article sounds very interesting. I find it kind o f fascinating that our skin can detect odors and trigger healing. Given that I did not choose to read this article, I am wondering aside from the nose, where else our skin can detect such odors. I am also curious as to what 11 scents they tested and which 4 produced the results.
DeleteThat's really interesting, especially since we could also trigger other things in the body using scents.
DeleteFive Reasons Why You Should Probably Stop Using Antibacterial Soap
ReplyDeleteThis week I read an article about why we should stop using antibacterial soap. The article said, if these soaps are not really doing their jobs, the products will be pulled off of all shelves by 2016. One reason why people should stop using antibacterial soap, is because they are no different from using regular soap and water. You many think that you are protecting yourself or your family from illness, but the common chemical triclosan, which is found in antibacterial soaps cannot be proved to protect anyone. The soaps may also lead to possible health concerns. Triclosan seems to interfere with the body’s thyroid hormone which can lead to infertility, obesity, and even cancer. At this point it is not even worth using. It can cause children to be more prone to allergies, and penetrate the skin and enter the bloodstream easier than anyone ever thought. Some scientists think that this is because when you use antibacterial soap it reduces exposure to bacteria. Since triclosan is in soap, it gets sent down the drain. Once the triclosan gets into the environment it disturbs the algae during photosynthesis. Not only is antibacterial soap unsafe for humans it’s unsafe for our environment. If we all can use little to no antibacterial soap we can be protected from the harmful effects of it
I find this topic about antibacterial soap quite interesting. I heard before that it is just as effective as regular soap, which is why my family has switched to just plain old bar soap. It's been working out great so far!
DeleteSince anti-bacterial soap has become so popular it can be hard to find regular products sometimes. Sometimes companies and advertisers promote products before they know what the dangers of them are.
DeleteFive Reasons Why You Should Probably Stop Using Antibacterial Soap
ReplyDeleteIn this article it explains why antibacterial soap is no more more effective than regular soap, and may be harmful. Antibacterial soap can hurt the environment if not completely gone after treatment at sewage plants. It also can possibly cause many health problems such as allergies, infertility, artificially-advanced early puberty, obesity, cancer and potentially even bacteria that is resistant to antibiotics that we use on them today. If companies can not fix this problem by 2016, then antibacterial soap will be pulled off the shelfs. To avoid any possible harm, it is best to not use antibacterial soap and instead just use regular, old-fashioned soap .
In response to Olivia, I’m honestly really concerned about using antibacterial soap that I have used probably millions of times in my lifetime. Knowing that the antibacterial soap can cause things like allergies, infertility, artificially-advanced early puberty, obesity, cancer and potentially bacteria that is resistant to the soap is kind of scary with that many outcomes. It also scares me how markets are still selling antibacterial soap when they know all of the possible effects. I think I’m going to switch to regular old-fashioned soap from now on.
DeleteIt's ironic that the products produced to keep us healthy end up having the opposite effect. I didn't even realize how often I use antibacterial soap until today, when I took a closer look at the bottle of hand soap I've using forever, and sure enough, there in small print it says "Anti-bacterial Hand Soap." Now a days we buy soaps for their appetizing smell, not paying attention to anything else. All soaps clean right? We'll have to pay better attention in the future.
DeleteThat's really interesting! I always thought antibacterial soap was better for you! I never knew that it caused things such as allergies, obesity and cancer!
DeleteIt's pretty crazy that something we originally developed to help us came back to hurt us and the environment. We should definitely put a stop to this and prepare for things like this in the future by rigorously testing products before making them available to the public.
DeleteI had no idea antibacterial soap is so dangerous! But I also think the soap should be pulled of the shelves right away because if we know how dangerous it is, why are the companies even allow to make it?
DeleteThe article I read was about how scientists are pretty much clueless about how many cells humans are made up of. Scientists say on average there are 37 billion cells, of course that number varies depending on the size of the person. The fact is, there are a lot of cells in each person, science just hasn't figured out a good way to count them all.
DeleteThe article I choose to read was the one about Anti-Bacterial hand soap. The article talked about why it is so bad for you and the environment. Triclosan is a drug that is in anything marked as "anti-bacterial" and is found to not be FDA approved. Because of this, the FDA found that the drug is more harmful then helpful. Thusly, all items marked in stores as "anti-bacterial" will be taken off all shelves by 2016.
ReplyDeleteHuman Skin Can Detect Odors, Some of Which May Help Trigger Healing
ReplyDeleteI read about how not only olfactory receptors are found in the nose, but also in the heart, liver, gut and skin. Scientists also cloned five different olfactory receptors and exposed them to ten different synthetic odors from sandalwood. They used sandalwood because it was used by East Asians as a healing agent. Four of the eleven odors had a positive effect on the olfactory receptors as they started a healing process.
That's really cool! I wonder if this will be used in the future to heal various sicknesses.
DeleteI read the article 5 Reasons Why You Should Stop Using Antibacterial soap. Antibacterial soap has no benefits and works just as well as ordinary soap. This being true, why waste more money on antibacterial soap? Interestingly enough, antibacterial soap could lead to health concerns such as peanut allergies or hay fever. Additionally, the soap kills the good, beneficial bacteria on our skin which protects us from germs and bad bacteria. Understandably antibacterial soaps are bad for the environment. All the soap chemicals get washed down the drain and find their way into lakes, oceans, river, and ponds. Naturally, this negatively affects ecosystems, starting a chain reaction. Some more reasons not to use antibacterial soaps are: they can create antibiotic resistant bacteria and they are endocrine disruptors. From now on, I’ll try to use non-antibacterial hand sanitizer and soap and water to wash my hands instead of antibacterial soap.
ReplyDeleteFive Reasons Why You Should Probably Stop Using Antibacterial Soap
ReplyDeleteThe article above talked a great deal about the rising health risks involved with antibacterial soap. The FDA announced recently that it was safer to wash hands with simple soap and water rather then antibacterial soap because it contains a chemical known as triclosan. I find it a bit funny that the FDA has been trying to publish a set of guidelines for the chemical around thirty years without stopping us from using the soaps in the meantime. Research claims that antibacterial soap is no more effective than regular soap and water, and that the soaps might lead to health problems such as developing allergies or cancer. I completely agree with the stance in the article because I believe that a bit of bacteria is good for you, and keeping your body from healthy exposure with antibacterial products can harm you. I wash my hands all of the time with regular soap and I'm not bothered by the germs of other people or eating a chip off the floor, and I don't get sick all that often. Meanwhile, I have a good family of friends that spray everything with Lysol and use antibacterial soap and wipes, and they end up sick constantly. I've always attributed it to the fact they haven't been exposed to the small doses of bacteria found everywhere, so when they get hit with a real mess of it, they get sick right away. Next time you worry about germs or whether or not the soap is antibacterial, remember that a little bacteria goes a long way in building your immune system!
Why Does Very Hot Water Sometimes Feel Cold?
ReplyDeleteIn this article it talks about why sometimes when hot water on your body feels like ice cold water. A nerve called thermoreceptor is the nerve in your body that transmits the signal to your brain if the water is hot or cold. But when under extreme temperature the thermoreceptor nerve can sometimes misinterpret the temperature of the water and sends the wrong message to the brain, making the water feel ice cold when it's really hot. So the cause of a person feeling cold water when the water is very hot is because of misinterpreting nerves.
That is very interesting how nerves can misinterpret the feeling of water. That sounds really cool.
DeleteThat is very interesting how our nerves sometimes cannot tell what the water feels like. Very interesting.
Delete5 Reasons to Stop using Antibacterial Soap
ReplyDeleteI read this article because my Mom has recently been telling me that antibacterial soap isn’t good for you, but she never really explained the science behind it. A big part of antibacterial soap is a chemical called, triclosan which kills bacteria. But after doing over 40 years of testing there’s no actual proof that triclosan can/will kill bacteria that causes colds and the flu. Overall, this chemical kills more bacteria, but not necessarily bacteria that triggers viruses. Secondly, with the use of triclosan can increase the risk of creating bacteria that can resist chemicals. This is a big problem because if a doctor tries to give you antibiotics to kill bad bacteria in your body, but the bacteria has become immune to it, you could face grave illness. Triclosan can also interfere with our bodies regulation of the thyroid hormone, by sticking to its receptors. If this happens at too large of a scale, it can cause infertility, cancer and obesity. Along with messing with some of our bodies’ hormones, extra exposure to triclosan can cause Peanut allergies and Hay fever for children. Because the chemical is limiting so much of the body’s exposure to bacteria, this can actually weaken its ability to fight off bad bacteria. But triclosan is not only a danger for us, this chemical can also affect our environment. When we wash our hands with antibacterial soap it releases triclosan gas that eventually flows down the drain. Unfortunately it has been found, that even after being treated at sewage plants, remnants of triclosan still remain in the water. When this water reaches rivers and streams it can prevent algae from photosynthesis. So, this flu season for the sake of our health and environment, when wanting to stay well washing your hands the old fashioned way is best. The most important thing is washing thoroughly for at least 30 seconds.
I also read this article and found it really interesting. I learned a lot of new facts that I didn't think I wouldn't of known before especially all the facts it gave about the drug triclosan, and all the negative affects that comes with the use of it.
DeleteArticle: Why Does Very Hot Water Sometimes Feel Cold?
ReplyDeleteIn this article they talked about why very hot water once touching your skin feels cold for a second then feels warm again. This is because your thermosensors in your body malfunction and your pain sensors respond to the heat. The they send a signal to the brain and it gets misinterpreted as cold not warm, so you feel cold for a second not warm. The article also talked about what are the temperatures that your thermosensors react to. Your cold receptors react to temperatures ranging from 68-86 degrees, while your warm receptors react to temperatures ranging from 86-106 degrees. Overall the article was very informational, and I learned a lot reading about thermosensors in the body.
It is a great mystery that something so hot could make our bodies feel cold. It's is also fascinating that the body mistakes it for cold and not warm. It's very strange but I wonder what makes it act this way.
DeleteI read the article about why very hot water sometimes feels cold. In the article is said that we have nerve endings beneath our skin called thermoreceptors. It also says that sometimes if the temperature is above 113 degrees ferinheight this sometimes makes the cold receptors react.
ReplyDeleteI read the article Scientists Have Basically No Idea How Many Cells Are in the Human Body. The article explains that scientists have an estimation of anywhere from 5-724 trillion cells in the human body. I can't believe that my body may harbor more than 100 trillion cells! The reason that scientists can't say how many cells are in a person is that no one is the same shape and size meaning everyone has a different amount. So it is practically impossible for now to tell how many cells a person has.
ReplyDeleteThe article that I read was called "Human Skin Can Detect Odors, Some of Which May Help Trigger Healing". The article talked about how we have Olfactory cell sensors on our skin and not just in the our nose. Scientists exposed these cells to sandalwood odors. Some cells reacted to the scents. Sandalwood is a said to be a healing agent. That means our odor cells have the potential to heal the injuries on our skin. Knowing this that means our Olfactory receptors on our skin may be important in the future.
ReplyDeleteI read about how sometimes hot water feels cold, and why. The reason is because there are two types of thermal receptors; hot, and cold. The cold receptors react between 68-86 degrees, and the hot reacts between 86-104. Above 104, or below 68, the sensation is accompanied by pain. The reason hot water sometimes feels ice cold is because when it's too hot, some cold receptors may fire. No one knows why this is, although I support the theory that it's because the hot and cold receptors are the same.
ReplyDeleteI can see how this would be the case since I have experienced it first hand.
DeleteI could see your reasoning behind your theory. but i personally support that the receptors will all fire if it's to hot and your body experiences pain telling the brain that it's above the range of temperature that it should be.
DeleteI read the article about how when very hot water touches your skin sometimes it feels cold. I learned that the human body senses temperature changes through specialized nerve endings called thermoreceptors. These are located under the skin and are throughout your whole body. Another thing i learned was that the human body has both cold and warm receptors that react when you are touching something hot or cold. This article was very interesting because I knew what it felt like to touch very hot water and have it feel cold, but I didn't know why.
ReplyDeleteI also read this article! It was so cool to hear the answer to a question that I always wonder about!
Deletehttp://www.smithsonianmag.com/science-nature/why-does-very-hot-water-sometimes-feel-cold-180953532/?no-ist
ReplyDeleteThis article explains many scientists theories on why very hot water feels cold at first. There are thermoreceptors under our skin that respond to both the cold and the heat. Some scientists think that the fact we think very hot water is cold is because of a malfunction in the thermoreceptor system, while other scientists think that the receptors are simply very advanced and can do double duty. Either way, it will continue to be a heated debate until further information is collected.
So I read the article about how sometimes really hot water can feel cold. And it talked about how Cold receptors primarily react to temperatures ranging from 68 to 86 degrees Fahrenheit, while warm receptors are activated between 86 and 104 degrees Fahrenheit. And it turns out some cold receptors are activated after extreme temperatures like 113 degrees Fahrenheit. And one scientist said that there are far more cold receptors under the skin then there are warm receptors. That explains why when you turn the heat up all the way on the shower and then go in it feels cold yet painful. So overall that was what the article I read was about.
ReplyDeleteI completely agree i have experienced and i actually experience this every day when i go take a shower
DeleteI agree this is a very unusual effect that effects the body. Its also weird it happens at 113 degrees
DeleteIn response to Matt. It is very interesting how react to temperature, but it makes you think, why do we have more cold receptors then warm?
DeleteI thought it was extremely interesting Matt how the body can react as if the water if it was cold, when it was really hot. Not only that, but this shows me that the body can come into shock due to an extreme temperature change.
DeleteI had no idea there are more cold receptors in my body than warm. I'm pretty much always cold no matter what time of the year. I wonder if I have extra cold receptors?
Deletehttp://www.smithsonianmag.com/smart-news/human-skin-can-detect-odors-some-which-help-trigger-healing-180952006/?no-ist
ReplyDeleteThis article was very interesting, it would seem to be crazy that our skin would react depending on certain odors. The article says that certain odors can cause our skin cells to start and even quicken the healing process. The one they tested was natural and human made sandalwood odors. One in particular seemed to work very good in the process of speeding up the healing. The most interesting part is in ancient east asia they discovered this and used to wear the odor as perfume and for the healing process.
In response to Gabriel, I too thought that this article was interesting because of the fact that the cells in our nose have a few healing properties which makes me think of the future and how they make help later to come.
DeleteI read the article about how human skin can detect odors. I thought this article was very interesting. The article talks about how scientists figured out that the human skin, along with other parts of the human body, such as the heart, has smell receptors on it that detect smell that they believe may help trigger healing. The scientists then experimented with sandalore and found out that cell proliferation after exposure to sandalore also increased by more than 30%. This makes me wonder if this knowledge will ever be used by doctors.
ReplyDeleteMy article was “Why you should stop using antibacterial soap” and I thought the article was interesting. After years of research, the FDA come to the conclusion of antibacterial soap being unhealthy. This kind of soap has triclosan as an ingredient and it is very harmful. Children exposed to this ingredient have a higher chance of getting allergies. This product will eventually be pulled off the shelves of stores because of this dangerous drug that is included in it.
ReplyDeletethat is very strange, seeing as though throughout our lives we have always been told to was our hands with antibacterial soap.
DeleteI read the article “Five Reasons Why You Should Probably Stop Using Antibacterial Soap” and I found it very interesting. This article is about how antibacterial soap can cause many bad things to happen. This is because of the chemical called triclosan. Triclosan can cause thyroid problems in animals, and the long term effects can potentially hurt people. Also if babies use antibacterial soap, their bodies has a hard time developing a “defense” against bacteria and other things that can make you sick. I for one am going to stop buying antibacterial soap!
ReplyDeleteI read the article “Five Reasons Why You Should Probably Stop Using Antibacterial Soap”. In the article they talked about the FDA seeing antibacterial soap no more effective than just regular old soap and water. In the article it stated that FDA is giving companies until the year 2016 to come up with a good reason on why they should keep their antibacterial soaps on the shelf. The main points on why antibacterial soap could become dangerous is because they have the potential to create antibiotic-resistant bacteria, could act as endocrine disruptor, could lead to other health problems, and it’s bad for the environment. I for one want to do some more research on this topic and decide if I should stop buying antibacterial soap or if it’s really not a concern.
ReplyDeleteThat's crazy that antibacterial soap isn't actually more effective than the normal soap and water we use every day. Considering the fact about the soap having the potential to create the antibiotic-resistant bacteria, I would say it doesn't belong in stores.
DeleteI find this very interesting. I always thought antibacterial soap was supposed to kill more germs than normal soap. I never thought about the bacteria being able to form a resistance to it.
DeleteI read the same article and wanted to do a little more research myself. This topic is extremely interesting, since antibacterial soap is such a common product that is within almost all households today.
DeleteBlog #10-
ReplyDeleteI chose to read about the article called Five Reasons Why You Should Probably Stop Using Antibacterial Hand Soap. I was instantly drawn to this article, because I definitely us antibacterial hand soap. The article starts off by talking about how hand soap contains a chemical called triclosan as an active ingredient. During an FDA evaluation, manufacturers must show that there is a difference from using antibacterial hand soap compared to that of regular soap and water. Since that has not been shown or proven yet, manufacturers only have until 2016, or else the product must be removed from the shelves. A second reason they say to stop using antibacterial hand soap would be that they have the potential to create antibiotic-resistant bacteria. The FDA claims this as an issue because of a range of possible health risks associated with triclosan, and bacterial resistance is first on the list. If the chemical is used frequently enough, then it will kill other bacteria but allow resistant subset to proliferate. The third reason is that the soaps could act as endocrine disruptors. This means that it seems to interfere with the body’s regulation of growth hormone in rats, frogs and other animals. Now it is being noticed that if in humans, there are worries that it could lead to problems with fertility, artificially-advanced early puberty, obesity and cancer.. But note that it has not been found in humans yet. Reason number four is just that the soaps might lead to further health problems than what was just stated. For example, there is evidence that children with prolonged exposure to triclosan have a higher chance of developing allergies such as peanut allergies and hay fever. Lastly, reason number five is that antibacterial hand soaps are bad for the environment. The main idea of this last reason is that when we use a lot of triclosan in soap, that means a lot of triclosan gets flushed down the drain and once in the environment, it can disrupt algae’s ability to perform photosynthesis.
Why Does Very Hot Water Sometimes Feel Cold?
ReplyDeleteI learned that the human body contains thermoreceptors, which are nerve endings just beneath the skin that sense temperature change. The cold receptors are activated if there is a decrease and temperature, and the warm receptors are activated if there is an increase in temperature. These nerves also respond to specific chemicals. Something that I found strange was the fact that when the temperature passes 113 degrees those cold receptors can be activated. Scientists call this paradoxical cold, and no one is quite sure how or why it happens. Another case like this exists too, and you probably guessed it, but it’s called paradoxical heat, which is when temperatures are extremely cold and your warm receptors seem to activate. I find it crazy that even though it seems like we know so much, there is always something new to discover!
I read the article "Five Reasons Why You Should Probably Stop Using Antibacterial Soap” While I was reading it, I decided to see if my family had any, I looked throughout the house and asked around, and we had none. Whether it is coincidence or not, we just choose not to buy it. Probably because of price. I was really surprised when it said the soap is harming us more than we think, as we can accidentally ingest this triclosan, and cause body problems. I figured it would create more resistant bacteria, and that it would harm the Earth, but I also found that regular soap and water is just as effective. So now I know not to buy Antibacterial soap when I am older, if it is still on the shelves.
ReplyDeleteI read the article "Why Does Very Hot Water Sometimes Feel Cold?". I learned many interesting things while reading this article. For example i learned, the human body senses temperature changes through specialized nerve endings called thermoeceptors, located just under the skin. These receptors are all throughout the body and are always transmitting temperature information to the brain. Another piece of information i took away from this was thatCapsaicin, a chemical found in chili peppers, has been shown to activate warm receptors, causing the familiar red-hot burning and sweating reaction that comes with a spicy meal.Overall, this article really answered a lot of my questions that i had when like getting that cold feeling when touching very hot water.
ReplyDeleteI read the article "Human Skin Can Detect Odors, Some of Which May Help Trigger Healing". This article explains that other than the olfactory (smell) receptors in our nose we have around 150 other types of them in strange places. The heart, liver, gut and even our skin have smell receptors on/in them. The article also says that these receptors in our body may even have a role in healing. The article explains a study where scientists cloned some of the smell receptors on our skin and exposed them to ten different odors made from sandalwood. They found that some of the odors started the cells on a process that was like the healing of a wound. According to New Scientist, since skin smell receptors are not as sensitive as the ones in our noses, the concentrations of the odors were "a thousand times higher than those needed to activate a receptor in the nose.”
ReplyDeleteI read the article about why hot water sometimes feel cold. Scientists find this topic quite puzzling. They still don’t know why this happens. They do believe that is has something to do with the thermoreceptors. Some scientists believe that there is more cold thermoreceptors than there are warm. Therefore the cold thermoreceptors get to the brain faster. Some think it’s just a malfunction in the system. I personally would love to know the answer to this puzzling question.
ReplyDeleteI read about water feeling cold but really its hot. Basically the human body has these nerve ending called thermoreceptors. Cold receptors have a range of 68 to 86 degrees Fahrenheit while warm ranges from 86 to 104 degrees Fahrenheit. But when you go in the shower the temp is about at 113 degrees fahrenheit it sets off both cold and hot receptors. This is why water is really hot but feels cold sometimes
ReplyDeleteI chose to the read the article on why hot water feels cold sometimes. I sometimes wonder this because if you get in a hot tub or if you touch really hot water it feels cold for a few seconds. The temperature that this occurs is at 113 degrees Fahrenheit. They discussed that sometimes are skin feels different things at different temperatures because our sensors can play tricks on our brains. It’s called paradoxical cold, and has puzzled scientists for decades. Far as now they can't explain why we do this.
ReplyDeleteI read Human Skin Can Detect Odors, Some of Which May Help Trigger Healing. This was a very interesting article! It detailed that we have about 150 smell receptors in rather odd places, such as the heart, liver, and gut. In a new study about this discovery, they cloned the 5 different cells on the skin that have smell receptors, and exposed the cells to 10 different synthetic odors derived from sandalwood, a healing agent and perfum used in ancient east Asia. When they were exposed,some of the cells receptors began displaying characteristics of wound healing. But one of these odors in particular, called sandalore, activated a major healing boost! imagine the evolutionary backgrounds for this!
ReplyDeleteI read the article, “Five reasons why you should stop using Antibacterial Soap”. This article explains why antibacterial soap seems like it is more effective towards getting rid of germs, but it doesn’t necessarily replace soap and water. The drug used in these soaps is called triclosan that manufacturers want people to believe antibacterial soaps and gels will prevent more colds. Reasons why these soaps are not necessary is because there are no real statistics that it causes more health benefits than regular soap. It can also cause antibiotic resistant bacteria, allowing bacteria to become stronger which defeats the purpose. Antibacterial soap could possibly affect hormones, which could trigger problems like cancer and make other health problems. They are also bad for the environment.
ReplyDeleteI read the article about the scent detectors in human skin. It came as a surprise to me that our skin has those types of capabilities. The article claims that these odor “sensors” are called olfactory receptors, and they can be found in the oddest places: the liver, skin, gut and heart. An experiment was carried out to test the sensitivity of one of the five olfactory receptors in skin and the results were very . Apparently, the scent of sandalwood was often used in ancient Asia for it’s healing powers. Scientists took synthetic sandalwood and exposed the receptors to it, and it triggered a cellular reaction similar to healing. This information may completely alter the way we look at the science of healing and provide the ability to heal wounds more quickly and efficiently.
ReplyDeleteIn response to Mia W. I think it is very interesting how our nerves work and getting a cold sensation when we should feel the temperature to be hot! This also seems like when you get a fever and expect to feel really hot but end up shivering!
ReplyDeleteI read the article “Why does very hot water sometimes feel cold?” The human body senses temperature changes through specialized nerve endings called thermoreceptors. This is the reason we feel a cold sensation from super hot water. The receptors are located beneath the skin. These receptors are distributed throughout the body and are constantly transmitting temperature information to the brain. A decrease in temperature activates cold receptors, and an increase activates warm receptors. This information was so cool because i have always wondered why this happens. So hearing about the answer to it is so cool!
ReplyDeleteI read the article explaining why sometimes extreme sensations of heat, are first experienced as an icy cold feeling. This sensation only occurs when the thermorecepters, nerves controlling your feeling of temperature change, encounter temperatures higher than 113 degrees Fahrenheit. Scientists have not yet come to a conclusion on the topic, but most agree with the theory that it is a malfunction within the receptors. Aside from this information, I also found the fact the our thermoceptros can be triggered by certain chemical substances;this explains why Icy-Hot works which is because menthol is in Icy-Hot, and menthol is one of those chemicals which can trigger thermoreceptors.
ReplyDeleteI chose to red the article "Why does very hot water sometimes feel cold?". In the article it talked about paradoxical cold, which occurs when something is usually above 113 degrees Fahrenheit. Your body has warm receptors and cold receptors in the skin. the cold ones fire at temps. ranging from 68 to 86 degrees and warm receptors fire at 86 to 104 degrees. when you get in the shower and the water and it's above 113 degrees your body also shoots off cold receptors as well as warm receptors. Thus making paradoxical cold. there are many theories as to why this happens and scientists don't know why yet, so there is much debate about it across the science world.
ReplyDeletehttp://www.smithsonianmag.com/smart-news/scientists-have-basically-no-idea-how-many-cells-are-human-body-180952800/
ReplyDeleteI read the article about how scientists have no idea how many cells are within the human body. This really surprised me. Its weird to think that we are one of the most technologically advanced countries and we know how to cure and treat many diseases, but yet we don't know how many cells are within the human body. I understand that there is most likely a very wide range for how many cells there may be in a single human. I wonder by when we may have the power necessary to find out.
I read the article “Why does Very Hot Water Feel So Cold”.
ReplyDeleteThis article said that hot water can feel really cold sometimes is because of something called paradoxical cold. Paradoxical cold happens because of nerve receptors below the skin that react to cold and hot temperatures. The cold receptors react to temperatures anywhere from 68 to 86 degrees fahrenheit, while the hot receptors work anywhere from 86 to 104 degrees fahrenheit. Sometimes after being outside on a cold day, and then getting into a very warm shower can feel really cold and painful. This is because your cold receptors will react sometimes at temperatures over 113 degrees fahrenheit. Which causes your brain to think the water is extremely cold. So pretty much the reason why people think extremely hot water is extremely cold is all because of a malfunction in their nerve cells that tell the brain if something is hot or cold.
I read the article, "Why Does Very Hot Water Sometimes Feel Cold?" I learned that the human body senses temperature changes through nerve endings called thermoreceptors. Our bodies have both cold and warm receptors that react when we touch something hot or cold. When hot temperatures feel cold, it is known as a paradoxical cold. Though scientists do not know for sure what causes paradoxical cold, they have may good ideas as to why and are testing their theories. I find it very cool, and even though I didn't find out exactly why my hot showers feel cold, it's interesting to have an idea.
ReplyDeleteWhy Does Very Hot Water Sometimes Feel Cold?
ReplyDeleteMy article explained the feeling of extreme cold, when infact you touch water that is very hot. It told that there are temperature receptors, for hot and separate ones for cold. When the body is in contact with 113 degrees or higher, it can stimulate the cold receptors in the phenomena of paradox cold. This was a very interesting article and I am very glad I chose it. I have always wondered it, and then next time I accidentally scald myself, I'll know exactly why I get the chills!
I read the article about how Human Skin Can Detect Odors and it was a cool, quick, and concise article which I loved! Scientist identified 5 different receptors on the skin and cloned them. They then with these cloned recptors exposed them to different odors from sandalwood which in ancient times was used as a perfume and to heal stuff. 4 of the different odors had a positive affect on the cells and showed signs of healing. Overall, the skin receptors are not as sensitive or distinctly perfect as our noses, but they get the job done.
ReplyDeleteThe article I read was "Five Reasons Why You Should Probably Stop Using Antibacterial Soap". The article begins with saying that the FDA recommends your average soap rather than antibacterial for a few reasons. One of the key points from the article is that antibacterial soap isn't much different than normal soap, for the reason that the chemical tricsolan isn't proven to have benefits. Next, another point is that using too much can build up a tolerance for the bacteria and render it useless. These antibacterials also destroy the environment and cause health problems.
ReplyDelete*Five Reasons Why You Should Probably Stop Using Antibacterial Soap
ReplyDeleteAntibacterial soap has not been proven to have an extreme difference, in regards to the amount of bacteria killed while washing your hands. The old-fashioned bar of soap with water is a method that kills bacteria and keeps your hands clean. The chemical triclosan is an active ingredient in antibacterial soaps and it has the potential to create antibiotic-resistant bacteria. Also, these antibacterial soaps have the possibility to lead to serious health problems and they are bad for the environment. If companies can not fix this problem by 2016, than these antibacterial soaps will be pulled from the shelves.
I read the article "Why very hot water sometimes feels cold". In the article it explains that we have thermoreceptors that sense hot and cold substances. There are also many chemicals that can trigger these senses as well. Also, there are specific ranges that these receptors can go off and anything above the hot range and below the cold range will send a sharp pain through our bodies. Lastly, at about 113 degrees F the our cold receptors would go off along with the sharp pain. It is very interesting that something so hot can make our bodies feel cold.
ReplyDeletehttp://www.smithsonianmag.com/smart-news/scientists-have-basically-no-idea-how-many-cells-are-human-body-180952800/
ReplyDeleteI read the article "Scientists have basically no idea how many cells are in the human body". In the article it talked about how we really have no idea the exact range of cells in the body but it is estimated to be around 37 trillion with a range of 5 trillion to 724,000,000,000,000 cells!!! Its very interesting to me to know that trillions of cells we cant see make up who we are.
I read the article "Why Does Very Hot Water Sometimes Feel Cold?" In the story it states that the body contains receptors that transmit temperature information to the head. Cold receptors can range from 68-86 degrees Fahrenheit and warm receptors range from 86-104 degrees Fahrenheit. Apparently when a receptor reaches over an extreme temperature it can result in a cold reaction. Scientists don't know why this happens and believes it part of evolution. Overall, this article showed me how our receptors can act differently due to an extreme temperature change. Not only that, but this means that the body an come into shock due to the temperature change
ReplyDeleteI read "Five Reasons Why You Should Probably Stop Using Antibacterial Soap." This article talks about how antibacterial soap has the same effect regular soap and water. Then it goes on to talk about the five reasons why. Some of the reasons were antibacterial soaps have the potential to create antibiotic-resistant bacteria and the soaps might lead to other health problems. It then talks about what you should use instead, like hand sanitizer. This is a very interesting take on the different kinds of soap, but I need more information if I'm really going to give up antibacterial soap.
ReplyDeletehttp://www.smithsonianmag.com/science-nature/five-reasons-why-you-should-probably-stop-using-antibacterial-soap-180948078/
ReplyDeleteMy article was about why antibacterial soap is bad for humans to use when washing their hands. The article explained that antibacterial soap is just as just as effective as regular soap, but many burdens come with it. Antibacterial soaps can be responsible for antibiotic resistant bacteria, the soaps can interfere with the endocrine system, the soaps may cause many common allergies, and the soaps can harm the environment. Overall, antibiotic soaps are not worth it when you can get the same benefits from regular soap without harming effects.
I read the article “Why Does Very Hot Water Sometimes Feel Cold?” and it’s basically about exactly the title. Basically, the human body has thermoreceptors- a type of nerve that feels hot or cold- and that there are different receptors depending on whether the object you are feeling is cold or hot. However, if the temperature reaches past a certain point, cold receptors can also fire, despite the fact that it is very hot. This is known as paradoxical cold. Scientists don’t actually know what causes paradoxical cold, but many have theories such as a malfunction or that the cold receptors double duty when it comes to interpreting pain. Also, having a higher internal body temperature- a fever- can make you more susceptible to these responders.
ReplyDeleteI think it's really cool how that happens.
DeleteI read "Five Reasons Why You Should Probably Stop Using Antibacterial Soap." This article talks about how antibacterial soap has the same effect regular soap and water. Then it goes on to talk about the five reasons why. Some of the reasons were antibacterial soaps have the potential to create antibiotic-resistant bacteria and the soaps might lead to other health problems. I had never thought that this could be possible. The article talks about maybe using hand sanitizer instead.
ReplyDeleteI read the article: Why does hot water sometimes feel very cold? Basically in the article it talked about how our bodies have hot and cold nerve endings called theromreceptors. They work just as you would expect them to work. Cold for cold and hot for hot. But sometimes your brain is not fast enough and misinterprets the signals. This is known as paradoxical cold.
ReplyDeleteI read the article "Scientists Have Basically No Idea How Many Cells Are in the Human Body" and it was about how we know so much already but don't even know how many cells are in our own bodies. It makes sense though because cells are constantly dividing and multiplying so it would be difficult to really pinpoint a number.
ReplyDeletehttp://www.smithsonianmag.com/science-nature/five-reasons-why-you-should-probably-stop-using-antibacterial-soap-180948078/?no-ist
ReplyDeleteMy article claimed that antibacterial soaps are more harmful than helpful. They said that its hardly more helpful than just plain soap and water. It also has the potential to create more antibacterial resistant bacteria if it is used too often. Antibacterial soaps could also be endocrine disruptions, meaning the triclosan used in some soaps could interfere with thyroid hormone production and lead to many problems with fertility, puberty, obesity, and cancer. Along with that, there are other health hazards, including a greater risk of children getting allergies or hay fever. And finally, antibacterial soaps are bad for the enviornment - triclosan can sometimes get through water filtration systems and and into lakes and rivers, and the chemical hurts algae, which could wreak havoc on an environment. The article recommends just using normal soap and water and rinsing for 30 seconds.
I read the article, "why does very hot water sometimes feel cold?". Ive always wanted to know why sometimes when I wash my hands with really hot water why it feels cold to me. The article states that just beneath the skin we have thermoreceptors that transmit temperatures to the brain. At temperatures of 68-86 the cold receptors are activated. At temperatures of 86-104, is when our warm receptors are activated. Now scientists are discovering that at temperatures of 113 degrees, cold receptors are being activated. Some theories that scientists have is that the cold receptors do double duty so when temperatures get too extreme for the warm receptors to handle, the cold receptors start to fire up. Another factor that plays a role in having cold receptors fire up is that there are way more cold receptors than warm. Also, the reaction time of the cold receptors to the brain is much faster than the warm receptors. This means that cold receptors are activated at such high temperatures because all the warm receptors are already doing all they can.
ReplyDeleteThat's interesting I've wondered the same thing as well. For example I went outside and it was snowing an cold out, then I came in and washed my hands. I put it up to the hottest it could possibly be and for some strange reason it was cold. Now I understand a lot better why it's like that. Also one time I poured cold water on my hands while it was cold outside and it felt warm and I was shocked but now I also understand why that happens. Know I have a better understanding of this stuff.
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