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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21
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1answer
12k views

Can you knock someone out with pressure points, in the style of a Vulcan nerve pinch?

Is it possible to pinch someone's nerve (on the shoulder) in a manner similar to the way Spock would do on Star Trek such that the person would either pass-out or result in being temporarily paralyzed?...
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Is vinegar an effective treatment for arthritis?

I've learned that some people take vinegar to treat arthritis. It's a well known folk cure. Natural News: http://www.naturalnews.com/026715_apple_pain_vinegar.html Learn How to Relieve Arthritis and ...
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Can mobile apps monitor your sleep cycles?

There's already been a question about devices that can help you monitor your sleep and their possible benefits, but I'm interested specifically in the apps for mobile devices that claim to be able to ...
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Is yogurt affected by human emotions?

The documentary I Am (Wikipedia) (YouTube video) makes a number of claims, including that more signals are sent from the heart to the brain than vice-versa, and that the your emotion or mood can have ...
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Did an Indian baby spontaneously combust 4 times?

I was just reading the "news". There's a story going around about a baby in India who has spontaneously combusted 4 times. The story has turned up in numerous "news" sites around the globe. "A ...
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Do out of sync propellors make passengers more likely to be airsick?

In a multi-engine propellor-driven aircraft, propellor synchronization occurs when the two propellors are turning at the same RPM. Propellor synchronization eliminates beating. The purpose is for ...
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811 views

Is Eşref Armağan an eyeless painter?

There are a number of articles online about a blind, Turkish painter, Eşref Armağan. born without eyes, including a short Wikipedia entry. Purportedly, he's able to create paintings with color and ...
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Can people castrate reindeer by biting off the testicles?

This Youtube video depicts a Sami woman castrating a reindeer by biting off the testicles (although the moment suprême is not shown explicitly): Laplander Reindeer Castration (warning: video depicts ...
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Do fingers in water get wrinkled due to a nervous system response?

I had always thought that the fingers were getting wrinkled when I left them within the water for a long time due to swelling of the outer layers of skin but I just read in several places that it is a ...
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Can you cause mosquitos to explode from drinking too much blood by flexing your muscles?

I have heard several times as I've grown up that you can flex your muscles to make mosquitos get stuck and explode. Looking around the web, I find several sources claiming the same. Q: If you flex ...
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Can humans functionally move their eyeballs independently of one another?

Recently I see a lot of links to Ed Macy's book "Apache" (related from Google glass articles' comments). It took me two years to learn how to "see" properly -- how to see in an Apache World. I ...
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Were giant human bones discovered in Castelnau?

French anthropologist Georges Vacher de Lapouge (1854 - 1936) reported in 1890 the discovery of "the Giant of Castelnau" - giant bones in neolithic tombs, in southern France. According to Mr. de ...
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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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How sensitive are human ears?

I read about this on a question on Quora, and found a source for the fact below: When a pin is dropped, the sound reaching the human ear causes the eardrum to move by a distance less than the ...
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What is the Atacama Humanoid?

The Atacama Humanoid is the skeletal remains of a 6-inch (150 mm) humanoid found in the Atacama Desert of Chile in 2003 There have been many different claims as to its origin, including: a ...
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How many days can you live without food? [duplicate]

I am a Malaysian. A few days ago, one of my country's political speakers claimed he didn't eat anything for 10 days, and he just survived by drinking water. This phenomenon really make me interested ...
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Could smoking cause erectile dysfunction?

I was told that smoking 'menthol' cigarettes could cause erectile dysfunction. But I don't know how much of this is true so I wanted to know how much of this is true... Here is an example of the ...
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1answer
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Do body piercings lead to fat gain?

A Facebook friend was concerned by this report Don’t get pierced! Body piercings can raise cortisol levels and lead to fat gain, and no site is as susceptible to fat gain as your abs! If you have a ...
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Are there 60,000 miles of blood vessels in the human body?

I have been looking into relative size/volume/surface area of the circulatory system in different species e.g. mouse & man. The only estimates that I could find all quote the same number (60,000 ...
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Does menstruation affect the ability of women to do blue-collar work?

I just read about the concept of menstrual leave. The Wikipedia article says it originated in Japan, and applies in a couple of asian countries. In 2005, Australian Manufacturing Workers Union ...
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Alcohol good or bad? [duplicate]

I see moderate alcohol shows (supposed) benefits for health and long life. I am 42 and experienced a mid life crisis 4 months ago (initially a nervous breakdown). I am slowly getting better but stil ...
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Are women physically weaker?

I've always thought that "women are weaker1 than men in general" was a biological fact (supposedly stemming/evolving from the social structure of prehistoric humans) However, in this video (~21:36), ...
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Does it take the same force to bite through a finger as a carrot?

I've heard (multiple times) that your finger is as easy to bite through as a carrot. Here are some places I've seen it proposed: KGBAnswers WikiAnswers Additionally, it is a popular question on ...
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Are only 5% of Americans naturally blonde?

In his phenomenally thorough study of what the typical porn star looks like (see Is the typical female porn star a big-boobed blonde?) John Millward mentions in passing that: only 5% of Americans ...
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1answer
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Is the typical female porn star a big-boobed blonde?

Common opinion seems to believe that the most popular female porn stars are blonds with big boobs. For example, this site from 2010 has Jenna Jameson as the most popular and she fits the description. ...
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Can Scopolamine turn people into mindless “zombies”?

Vice did a report about scopolamine dubbing it as the world's scariest drug. The story is that people being given that drug can be told to do anything, similar to some popular claims about hypnosis ...
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Are women weak in religion and reasoning as compared to men? [duplicate]

When Prophet Muhammad compared men and women as follows in one of the hadith, which says women are weaker in reason and religious. While it is difficult to understand deficiency in religion I would ...
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Does the average European adult weigh 71kg?

The Daily Mail says that the average weight of both males and females in Europe is UN 70.8kg in this article: http://www.dailymail.co.uk/sciencetech/article-2160934/Overweight-obese-threaten-world-...
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Do the number of myofibrils increase with exercise?

According to this website, the number of myofibrils in a muscle can increase with exercise: Thus, the muscle cells’ myofibrils will increase in thickness and number. I had a look on google ...
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Can a woman lift a 1.5 ton car?

The Christian Post A woman lifted a car to save her dad, according to reports in an amazing and daring rescue. L. K. is reported to have lifted the 1.5 ton car [BMW 525i] off of her father in an ...
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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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Does the brain limit muscle strength in humans, but not in other apes?

In researching whether the brain limits our muscle strength, Sciencedaily has a quote: Add to this the effect of severe electric shock, where people are often thrown violently by their own extreme ...
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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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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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Will holding in your sneeze kill brain cells?

I heard from a friend that holding in your sneeze can actually kill a few of your brain cells. I did a google search, but most of the results had no evidence (e.g. Yahoo Answers). Moreover, I checked ...
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Do human eyes grow after birth?

My friend just assured me that when a person is born, their eyes are at the size they will be for the rest of their life, or, that they do not grow. A Google for this question shows that it has been ...
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Do women who live together get synchronized menstrual cycles?

I found a Wikipedia article on Menstrual synchrony, which claims: Menstrual synchrony, also known as the McClintock Effect, or the Wellesley Effect [1] is a phenomenon reported in 1971 wherein the ...
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1answer
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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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Do changes in weather make people more likely to get sick? [duplicate]

Possible Duplicate: Is time of the year a factor on the risk of catching a common cold? I've heard this from my father and I feel like I've experienced it personally, but I can't tell whether or ...
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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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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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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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Do hares chew cud?

In Leviticus 11:6, a hare is referred to as a "chewer of the cud." What evidence is there on this matter? It is not necessary, strictly speaking, that the evidence be on chewing cud in the same sense ...
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Can a trained human eye catch microexpressions?

Microexpressions were validated in this question: Do involuntary "microexpressions" betray liars? But can a human eye (as opposed to a frame by frame analysis of a high-speed video) detect ...
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Does the DNA of one sperm contain 37.5 MB of information?

[Source] In an episode of the BBC show QI - Quite Interesting (Series J, Episode 1) Stephen Fry said: How much information do you think is in the DNA of one little sperm...? It's 37.5 MB... ...
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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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Can pumpkin/sunflower/flax/sesame/other seeds regulate hormones?

My wife has started using a technique using various seeds through various times to regulate hormone balance. Does this have any merit? Here's an example of using seeds as a supplement to regulate ...
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Length of uncoiled human DNA

I recently came across this fact: There's enough DNA in the human body to stretch from the sun to Pluto and back. A couple of "Bollocks!" alarms began to chime in my head. While I expect that it ...
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1answer
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Can dead men have erections and ejaculation?

This may sounds funny but when I searched about the question over the Internet, I found an overall report which stated as a conclusion: When the heart stops forcing the blood around the body, it ...
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Do red-headed people feel pain differently?

There is a long-standing belief among anaesthsetists that people with red hair need more anaesthetic. There even appears to be some evidence. to back up this widely held idea. Recently, though, a ...