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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1answer
485 views

Static contraction training: is working out for 25 seconds once a month enough to build muscle?

According to conventional wisdom, in order to get results in a timely manner, one should train multiple days a week lifting weights for several sets of 1–5 reps for strength and 6–12 reps for ...
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Does your hair grow faster when you're sick?

A friend told me that when you're sick, your hair grows faster. When I started asking a lot of questions, my friend said it's a known fact but she doesn't remember where she heard it first or what was ...
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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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Are bodily deficiencies “mapped” to facial acne?

There's a picture and body of text making its way through Tumblr again: What is your acne telling you? 1 & 2: Digestive System — Eat less processed or junk food, reduce the amount of ...
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Is this shoe lacing technique effective at preventing blackened toe nails?

See: Reddit: LPT: How to lace your running shoes (June 7, 2015) Reddit: Black toes from ultimate? (May 20, 2015) Runner's World: How To Lace Shoes: Prevent Black Toe Nails (March 4, 2011) They link ...
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Does getting a running start increase your vertical jump?

Many people believe that a run-up helps them to jump higher. Is this true? (While it seems natural to do this, I'm having trouble believing that horizontal speed can help one jump vertically.)
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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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Near death experiences — clinically dead person “sees” something, later verified to be true?

Related: Is there any explanation for a near-death experience? That question is about vague, light-in-the-tunnel near death experiences (NDEs). This question is about very specific claims I've heard ...
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Are sports drinks more effective at hydrating athletes than water?

A FiveThirtyEight article, You Don’t Need Sports Drinks To Stay Hydrated challenges that sports drinks help prevent dehydration or increase exercise and performance better than water. It claims that ...
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Can a lightbulb once inserted into your mouth be safely removed?

There is a viral video going around that repeats a claim I've heard before about getting a light bulb stuck in your mouth Graphic reads, The bulb shape allows it to be put into the mouth, but ...
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Does the body get fitter for a short period after athletic training? [closed]

According to Wikipedia, supercompensation is part of a basic principle of athletic training, first put forth in the 1950s. After the initial recovery from a training session, the body will be ...
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Did David Blaine hold his breath for 17 minutes?

David Blaine (born David Blaine White; April 4, 1973) is an American magician, illusionist and endurance artist. He is best known for his high-profile feats of endurance, and has made his name as a ...
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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 ...
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Is any unconscious person capable of full splits?

The following popular article on stretching claims that lack of flexibility is purely neurological (or even psychological) and that [almost] any unconscious person would be very stretchy, e.g. can be ...
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Does milk make your bones stronger?

It's a common notion that milk makes bones stronger; milk contains calcium and bones contain calcium. But obviously it's not the case that calcium ingested is immediately deposited into bones. In fact,...
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Does clapping children on the back in certain positions help clear mucus from their lungs?

Chest Physical Therapy (CPT) is the practice of clapping children on the back to clear mucus out of the lungs. FairView (a Minnesotan non-profit health site) recommends it for chest infections. ...
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Are men more attracted to women who are ovulating over those who are not?

Background In 2016, a Business Insider article by Rebecca Harrington asserted that there have been multiple studies supporting the notion that men are preferentially attracted to women who are ...
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Does eating nonsalty food with MSG make you thirsty?

Assume that you're thirsty after eating food that didn't taste salty while you were eating it. I know that MSG contains sodium. Quora posts and https://msgdish.com/msg-problems-and-answers/ still ...
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Does handling your food release digestive juices and enzymes that enhances the meal?

In a Google Arts & Culture article, Yẹ́misí Aríbisálà, "Nigerian essayist, writer and food memoirist", states the following: There are scientific claims that fingers have powerful nerve ...
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Does nail-biting indicate iron deficiency?

I've seen on a lot of websites that nail-biting behaviour is due to lack of iron in the blood. I'm wondering if is this actually true, or just an urban myth which has spread and spread?
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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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Can you get your legs stuck around a pole, leading to cramping and then death?

I came across this video that makes a series of claims based around a position that a person can apparently get stuck in around a pole, and unintentionally kill themselves: Tied up without a rope (...
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Does salt (or sodium) not make you thirsty?

This is from a Toronto MS thesis: High dietary sodium intake is hypothesized to increase food intake (FI), fluid intake and glycemic response. Two short-term randomized repeated-measures studies ...
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Can canning tomatoes while menstruating spoil the tomatoes?

My wife was recently canning tomatoes, and her aunt asked if she was on her period because supposedly that will ruin the batch. Her grandmother is the one that taught her aunt, but neither of us had ...
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Is the comeback of measles in the US “largely due to anti-vaxers?”

From CNN: In some recent years, there have been fewer than 100 cases nationwide. But the [measles] virus has made a comeback in other years, including 2019 -- largely due to anti-vaxers, experts ...
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Does UA Rush bodywear improve athletic performance?

Under Armor is selling a products made from a new fabric called Rush. During performance, the body emits heat. The responsive UA RUSH fabric absorbs that heat and converts it into infrared energy ...
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1answer
866 views

Is Texas, a relatively warm state, one of the leading states in hypothermia deaths?

This April 11, 2019 article on National Geographic about lost hikers and survival rates states (emphasis added): In Herrington’s wilderness survival courses, he teaches day hikers to pack a puffy ...
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1answer
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Does frequent sex cause vaginas to become permanently stretched?

This is a common belief, sometimes used to shame women - that virgins have 'tight' vaginas and women who partake in more sexual intercourse have 'loose' vaginas due to permanent stretching. Is this ...
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9answers
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Can trained humans run faster than all other animals on a marathon distance?

During the athletics world championship, a commentator mentioned casually during the marathon discipline that humans are faster over long distances than all animals. I'm unsure if this can be said ...
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1answer
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Does “power posing” affect testosterone and cortisol levels?

Social psychologist Amy Cuddy gave a TED talk in which she claims that adopting certain postures: can affect testosterone and cortisol levels in the brain. Business Insider Australia summarised it ...
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Does the color temperature of a computer screen affect sleep patterns?

There's a little tool called f.lux that claims: During the day, computer screens look good — they're designed to look like the sun. But, at 9PM, 10PM, or 3AM, you probably shouldn't be looking at ...
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Does the tongue have different taste zones?

I've seen quite a few of these "tongue maps", showing discrete borders between taste zones and often conflicting setups, like these two: Anecdotally, I can feel all tastes all over the tongue, more ...
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Can the size and shape of penis be enhanced permanently?

A very good friend of mine went to the UK for his master's two years ago. After his breakup and several hookups (via online dating sites), he told me that he is very depressed, especially after one of ...
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Are two layers better at insulating body heat than one double-thickness layer? [closed]

It is almost universally recommended that wearing multiple layers of clothing is the most effective way to stay warm in cold weather, compared to one thicker layer, although there seems to be little ...
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Do cold baths prevent flu?

A coworker of mine said that he never get any flu because he takes cold baths. I found this (very pseudoscientific-like) link defending this theory: https://ownyourhealth.wordpress.com/2007/09/20/...
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Does standing as opposed to sitting or lying improve brain activity?

I've been hearing since grade school that standing straight improves brain activity, that you will be able to think clearer, faster, better, etc. Mostly, it's teachers who say that, but I have yet to ...
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Does eating certain food types alter your body temperature?

Many articles claim that some foods will lower your body temperature, or prevent you overheating, and others will warm your body temperature. Some of the temperature-lowering claims are due to the ...
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Is there a relation between brain physiology and gender identity?

I recently came a cross a blog post that talked about DSD or Intersexuality as they rather call it. One of the claims that was made is that gender identity (that is, whether I think of myself as male ...
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1answer
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Is this 10 pack real?

I saw this video where a guy shows he has a 10 pack. Then in the comments people explain the human body only has 8 ab muscles. Some claim the bottom two muscles are implants. Can this be real, or ...
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1answer
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Do electromagnetic fields affect stress and the fight or flight response?

ArmoredSkeptic said on a recent video about ghosts that: EM fields actually trigger our fight or flight response Is that true?
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Does blood type affect what type of food is best for you?

I remember that, a few years ago, my parents were told that different blood types need to eat differently. From a quick look online, it seems to be called "Eat Right For Your Type." It claimed that, ...
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0answers
90 views

Are there diseases that correlate with an “endocannabinoid deficiency”? [closed]

There was a study published in Neuro Endocrinology Letters by Dr. Ethan Russo in 2004 that says many diseases being treated with cannabis correlate with an “endocannabinoid deficiency”, but I cannot ...
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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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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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Does vegetarian sweat smell better?

I've read this article online in a Belgian newspaper (in Dutch): Weet wat je zweet: deze 7 dingen wist je nog niet over zweten — HLN. Number 4 is saying that vegetarian sweat smells better then non ...
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1answer
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Is there a Chinese boy who can read in almost-perfect darkness?

Some news story now circulating states that A BOY has stunned medics with his ability to see in pitch black with his cat's eyes that glow in the dark. Doctors have studied Nong Youhui's ...
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Could someone dig themselves out of a grave?

Some notable stories and movies show characters being buried alive, and then digging themselves out. This has apparently happened in reality, such as this story: Girl digs self out of grave, points ...
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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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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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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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