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Questions tagged [physiology]

Human physiology is the science of the mechanical, physical, and biochemical functions of humans in good health, their organs, and the cells of which they are composed. The principal level of focus of physiology is at the level of organs and systems within systems.

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Does long-term use of MDMA (“Ecstasy”) cause cognitive impairment?

The MDMA page of Wikipedia currently states: A meta-analytic review of the published literature on memory show that ecstasy users may suffer short-term and long-term verbal memory impairment—with ...
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Are women more sensitive to high-pitched noises than men?

On Season 1, Episode 2 of The Big Bang Theory, characters Sheldon and Leonard are sneaking around in Penny's room. In order not to wake her, Sheldon warns Leonard to be careful to make pitched noises. ...
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Are physically attractive people more likely to be right wing politically?

The Guardian recently reported this: It is a finding unlikely to prove popular with Guardian readers, but a study has concluded that attractive people are more likely to be rightwing. The study ...
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Does the human appendix have a purpose, or is it more of an evolutionary leftover?

The "classic" explanation I was always taught at school for the appendix was that it probably once had a purpose and may have assisted with the digestion of cellulose, but is now just a redundant ...
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1answer
924 views

Do things taste better if they contain nutrients that the body needs?

Is there any evidence for the theory that things taste better if they contain nutrients that the body needs? I had a banana this morning and it tasted great. Is that why?
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Does orgasm trigger menstruation?

Wikipedia states, without a particularly satisfying source, that: Some sources say that achieving orgasm helps the uterus contract and expel the lining. It does quote some other opinions there, ...
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Does sleeping together naked help stay warm?

In a bunch of films and other entertainment, when characters find themselves in a cold place with no heating but must sleep, they conclude that to stay warm, they should sleep as close to each other ...
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1answer
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Do your taste buds change every seven years?

Twice in the last week I've heard and re-stated the 'fact' that your taste buds change every seven years. Example of claim: All Expert's Science for Kids Taste Buds change every 5 to 7 years and ...
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Is it possible to increase the breast size of a woman through massage?

Caitlin MacKenna writes in Increase a Cup Size in 30 Days with Breast Massage: If you massage your breasts for 20-30 minutes a day, they should grow one cup size larger in 30 days. Massage ...
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Do long-haired men have better intuition?

I found an article on Worldwide Hippies which describes a military experiment on the intuitive abilities of Native American trackers: Then they would pair two men together who had received the same ...
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Did Evan Longoria save a reporter with bare-hand catch?

Here's what I'm talking about. There are a lot of opinions whether it's fake or not, I really don't know! What are the chances that one (even a professional player, let alone common mortals) can ...
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Is it possible to stick a nail into your nose?

A friend showed me the following video a few minutes ago. He says that it's real, but I can't believe that actually. What do you think? http://www.youtube.com/watch?v=7z4h4Mxq_ys The video show some ...
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Are there incorruptible corpses?

The Roman Catholic Church claims that some corpses have supernaturally slow decomposition. Were those bodies examined by skeptics?
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Can egg shells be digested?

I tried Googling but got no significant trustworthy result in the top few searches. The only reference I found is here: where the answered has guaranteed it without any reference! Yes Egg shell is ...
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1answer
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Does it take time for the brain to realize that you have eaten too much?

A doctor told me to eat my meal only until I feel 3/4th full. The logic being that the stomach takes time to absorb the food and the brain takes time to register that fact and the signal that I have ...
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Do oxygen bars provide health benefits to a normal person?

Oxygen bars are a pretty common sight and I've heard many claims from their proponents about the alleged health benefits of them. However, everything I hear about them tends to be anecdotal, so I am ...
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Does sleeping on your left side improve digestion?

Does sleeping on the left side improve digestion? This article claims that it does, is there any truth to it? http://www.healthylifetricks.com/this-is-why-you-should-be-sleeping-on-your-left-side/ ...
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876 views

Do silicone breast implants cause health problems?

An article in Business Week Magazine (June 10, 1991, but can't yet find a link) kicked off a debate that raged throughout the 90's. It stated that silicone breast implants manufactured by two Big ...
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1answer
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Can Tummo yoga practitioners withstand extreme cold?

I have heard, and seen in TV, that many gurus do meditation in the Himalayas, without wearing any garments. An example is Tummo which is a meditation method from Tibetan Buddhism. It's been claimed ...
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Does hugging a romantic partner for 20 seconds cause an Oxytocin spike?

So I've been seeing a claim around a lot lately in various articles and "amazing fact" lists. Positive Psychology News is one example: after only 20 seconds of hugging a romantic partner, one can ...
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1answer
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Is vinegar a sunburn remedy?

While searching for a remedy for sunburn pain last year, I ran across multiple references to vinegar as an effective method in treating sunburn pain. Is there any research that validates or ...
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674 views

Do certain colors fatigue eyes faster?

This UX.SE question about the use of bright pink in graphic design prompted an answer that says it should not be used because “it hurts the eyes.” It cites a Color Matters website about this, and ...
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Is it possible for people over 25 years old to to grow taller?

Human height growth tends to saturate at age of 15 in females and 18-20 in males. But, many claim (i.e. "How to increase your height with easy exercises") that it is possible to increase your height ...
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Does brain mass have any correlation to intelligence?

According to many (I cannot find a source at the moment), Albert Einstein's brain weighed less than average. It is a common belief that there is no correlation between brain mass and intelligence. Is ...
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Are “ectomorph”, “mesomorph” and “endomorph” valid and useful descriptors?

In the 1940s, American psychologist William Herbert Sheldon formulated the theory of constitutional psychology. One of the proposals in this theory is that there are three basic elements, or ...
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1answer
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Is it good to drink Coke when sick?

I have always been told by my mom that when I feel nauseous, I should drink Coke. I've heard many people say the same. Is it true that it is good to drink Coke when you're feeling nauseous? If yes: ...
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Is there evidence that early humans hunted by running in packs over long distances to wear out their food?

As put forth by Christopher McDougall in the book Born to Run (more recently in a TED talk) and a number of recent articles.
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1answer
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Are there people who can't get high on marijuana?

I smoked my head off and can't feel anything. And my friends can get high just by breathing all the smoke in the room :) Someone told me that I need to try more and get used to it, and it will happen ...
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Can blood group affect behavior?

In Japan, blood group is believed to have ties with behavior. Is there scientific evidence for it?
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Does giving a drug to a former addict cause reestablishment of chemical dependence?

Joel Spitzer, an anti-smoking counsellor, claimed on whyquit.com that there is a law of addiction which is: The law of physiological addiction states administration of a drug to an addict will ...
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Are most women incapable of orgasm through vaginal stimulation alone?

In Wikipedia's article of Orgasm it suggests vaginal stimulation isn't sufficient for women's sexual pleasure: Kinsey found that most of the women he surveyed could not have vaginal orgasms.[59] He ...
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Does gliadin in wheat stimulate appetite to the point of obesity?

Dr William Davis claims that the protein gliadin in wheat (at least, strains grown since the '60s or so) stimulates appetite, leading to obesity. He has released a book on the topic, called Wheat ...
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Is the size of a penis when erect proportional to its size when flaccid?

I've heard this most commonly in that you're either a shower or a grower. For example this site talks about the claim accepting it as true. Is there any proof that a smaller flaccid penis (<10cm) ...
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1answer
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Can the explosion of a pressure cooker kill you?

According to this XKCD what-if?, the explosion of a pressure cooker is not dangerous in itself, the heat is the sole danger. They can explode, in a sense, but not as violently as you might fear (or ...
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1answer
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Is the last thing a person sees imprinted on their retina?

The scary stories told around the campfire often include people killed by a monstrous entity. Its image, imprinted on the victim's retina, drives the coroner out of their mind. Has anyone ever ...
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Can a single cup of coffee help a person to wake up and be more focused?

There are many examples of people claiming they need their morning cup of coffee in order to be able to function at their normal level: NIC blog: Like many early morning risers, I need my morning ...
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1answer
824 views

Do any stores play “Mosquito” noises that annoy teenagers but cannot be heard by adults?

I've heard (no pun intended) some claims that some storefronts in shopping malls play a noise that sounds like a mosquito, which apparently can't be heard by adults yet drives teenagers nuts. The ...
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1answer
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Can human males produce milk?

Can human males lactate (produce milk) in the manner females can? According to Wikipedia: Spontaneous lactation occasionally occurs in starving men; after World War II, for example, thousands of ...
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1answer
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Does soaking in natural hot springs have any health benefits when compared to soaking in heated non-spring water?

There exists a common belief that soaking in natural hot springs has significant health benefits. For example, Hotelexecutive.com claims that: So What Exactly Can Soaking in Natural Hot Springs Do? ...
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2answers
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Are specific scents sexually attractive to women or men?

The idea that certain fragrances can attract women is often used as a marketing tool to sell deodorants or perfumes for men. The same goes for women and men. They claim that if this product is used, ...
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1answer
670 views

In the case of memory loss due to a blunt force impact, can memory later be restored by means of another blunt force impact?

In the case of memory loss due to a blunt force impact, can memory later be restored by means of another blunt force impact? Seems fairly common on TV. I did find some anecdotal evidence of this: ...
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Can “Current Mohan” conduct high levels of electrical current through his body?

I saw this episode of Stan Lee's Superhumans featuring Raj Mohan Nair, also known as "Current Mohan". He seems to be able to conduct electric current through his body to power up household electrical ...
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Can people lift hundreds of pounds or run faster due to adrenaline?

You often hear stories about fathers lifting cars or heavy trees off their sons when an accident happens, but is there any truth to this? Can people suddenly lift more or run faster than they ...
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1answer
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Can you “learn” to wiggle your ears? [closed]

My friend knows how to wiggle his right ear only, and I tried to wiggle my ears as well, but he told me that I can't learn it, it has to be natural. Is there any study on this, or is it actually ...
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1answer
780 views

Do long married couples look more alike?

Most of the articles to prove this I can find quote a 1987 study which found Couples who originally bore no particular resemblance to each other when first married had, after 25 years of ...
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2answers
942 views

Is baldness inherited?

There are many articles on how baldness is inherited (mostly from the mother's side of the family). In the BBC Life program, the narrator linked baldness to higher levels of testosterone. Is ...
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1answer
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Is whispering harmful?

Scientific American spoke with Rebecca N. Gaughan, an ear, nose and throat (ENT) doctor in private practice in Olathe, Kan., to learn the answer. According to both Dr. Gaughan and my mother, ...
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2answers
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Do taste buds become less sensitive as you get older?

I've heard it explained that your taste buds become duller as you get older and that is why I can now eat things like carrots and mushrooms that I used to think tasted like garbage. Is it true that ...
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1answer
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Does locking one's knees lead to fainting?

I have been told that locking one's knees can lead to fainting or passing out, and if you need to stand for an extended period of time you should always avoid standing and not lock your knees. I just ...
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1answer
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Is it possible to cause a skin burn by telling a hypnotized subject they are touching a hot object?

I've read somewhere long ago that the following suggestibility experiment was performed: The experimenter asks the subject to hold their palm open, then tells them: "I'm going to put a very hot ...