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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14
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1answer
828 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 ...
9
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2answers
5k views

Are left-handed people more likely to die younger than right-handed people?

Several sources claim that left-handed people have shorter life-spans: A left-handed academic from North Dakota has revealed that left-handers tend to die younger than right-handers. The "generally"...
15
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1answer
41k views

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 ...
5
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1answer
2k views

Does drinking water (or Sports Drink) improve performance during sports activities?

I have been looking for some concrete study about the performance changes during sports when drinking water or a sports drink while doing the sport. Not after, not before. While, or during, if you ...
11
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2answers
3k views

Can men mentally rotate images better than women?

Arguing with colleagues about common gender beliefs, someone said that women can multi-task better but men can mentally rotate images better. I sent them the following in response to the first ...
23
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1answer
36k views

Does your heart stop beating when you sneeze?

I read the following quote in a paper: When you sneeze, all your body functions temporarily stop working. That also includes you heart beat. There is of course no explanation, reason, source, or ...
48
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9answers
21k views

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 ...
16
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1answer
17k views

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 ...
49
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3answers
4k views

Is cycling worse for the environment than driving to work if you need to take a shower?

I had an argument with a work colleague. He claims that me cycling to and from work is less environmentally friendly than driving because I will eat more as a result of expending more energy. I have ...
5
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0answers
11k views

Does bathing in chlorinated water ruin your tan?

Does bathing in swimming-pools (e.g., at hotels or water parks), where chlorine is added to the water, brighten your skin? I've heard from many different people that bathing in pools with chlorine ...
2
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3answers
644 views

Do patients with spinal cord injury recover faster with positive attitudes?

Patients with incomplete spinal cord injuries experience quadriplegia and paraplegia. With therapy, some portion of the patients will recover the ability to walk, either aided or unaided. Yet some of ...
4
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0answers
390 views

For people with high body odor, is it better to wear cotton or microfiber?

For people with high body odor, is it better to wear cotton or microfiber? It's a tough question as there is a good argument for both sides. Argument in favor of cotton: As it has lower ...
6
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2answers
3k views

Is it possible for thin weedy guys to look muscular like Arnold Schwarzenegger?

Quite often you can see guys slaving away at the gym, slurping on protein shakes or pounding the pavement. There are also frequently seen ads around the net with a simple animation of a thin guy ...
89
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3answers
56k views

Does every species get around a billion heartbeats on average?

I read this webcomic today: From: abominable.cc I have no idea where the author got his factoid about the billion heartbeats. But it sounds interesting. The examples I can think of (rabbits, humans,...
20
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1answer
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Do hot baths damage skin or nerves?

I like to take showers and baths hot enough to leave my skin pink when I come out. One of my friends has a much lower tolerance to hot water and has said that that soaking in hot water can damage the ...
11
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1answer
17k views

Are big ears a sign of intelligence?

Some people claim that ear size and shape is related to intelligence. For example, this writer. Has any real research been done on this?
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0answers
2k views

Does picking your nose make it grow?

Does pulling/tugging at your soft cartilage cause it to grow? Example of claim on answers.com Don't pick your nose. Compulsive nose picking, known as rhinotillexomania, can increase the size of ...
21
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1answer
5k views

Is breaking bricks/wood “karate style” an impressive feat?

Related: How do Shaolin monks break spears with their neck? For anyone unacquainted with the fairly impressive looking feat of breaking bricks (or wood) in martial arts, see THIS 1.5min video. I'd ...
16
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1answer
30k views

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 ...
5
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0answers
844 views

Does shaving your beard more frequently make it grow faster? [duplicate]

Possible Duplicate: If you shave or wax, will the hair grow back stronger or thicker? Some of my friends seem to have the same impression. Shaving daily your face seems to make hair grow faster ...
9
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1answer
3k views

Can martial artists strengthen limbs, appendages, and other parts of their bodies to “super-human” degrees?

In the book American Shaolin: Flying Kicks, Buddhist Monks, and the Legend of Iron Crotch: An Odyssey in the New China, the author describes his exposure to, and training in, some of the so-called "...
10
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1answer
1k views

Does foot size correlate to penis size?

I've heard that foot size is linked to the size of a man's penis. Is there any truth to this?
13
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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 ...
16
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1answer
9k views

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 ...
4
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1answer
880 views

Can epilepsy be cured without any medication?

A relative of mine tells us he suffered from epileptic fits as a child, and they've gone away without having taken any medication. We have never seen him in any "fit" ourselves - and are now ...
13
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1answer
4k views

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 ...
37
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1answer
7k views

Does one remain conscious after decapitation?

Various articles online claim anecdotal evidence from witnesses that a man's guillotine severed head remains conscious for some time after decapitation (here's an example). Some cite sources that the ...
34
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1answer
12k views

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 (...
36
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3answers
4k views

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 ...
11
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1answer
6k views

Can a metal plate in the head stop a bullet?

Spoiler alert for those who haven't seen the movie Faster. There is a scene in the movie where the character played by Dwayne "The Rock" Johnson is shot in the back of the head by Billy Bob Thornton ...
11
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1answer
2k views

Do some people have 'sensitive senses'?

This article says that: If you avoid bright light, loud noises, heavy perfumes and itchy clothing, you may find that you avoid hot and cold foods because you have sensitive teeth. I've ...
39
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1answer
4k views

Does the sound of water make one want to pee?

I've known it like forever, I think I was told so since I was a kid. But how true it actually is? I clearly can't see what's the connection between the sound of water and a natural need. From my own ...
23
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2answers
2k views

Are women's hands colder, and their hearts warmer?

I heard on the radio today that apparently a woman's hands are colder than a man's hands, but her heart is warmer. I didn't really believe this, but they stated that it was apparently scientifically ...
16
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1answer
3k views

Are there incorruptible corpses?

The Roman Catholic Church claims that some corpses have supernaturally slow decomposition. Were those bodies examined by skeptics?
24
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1answer
15k views

Will getting your feet wet make you sick?

I keep on reading about people living in the Northern Hemisphere who warn their children not to get their feet wet or else they will "catch the death of your cold". Is this really true? I mean will ...
16
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2answers
6k views

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 ...
18
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1answer
7k views

Does sleeping with our heads pointing towards north pose any health risks?

Does sleeping orientation (pointing one's head in a specific direction) has anything to do with any health problems(even minor ones)? If Earth's magnetic field has any detrimental effects on our ...
18
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1answer
13k views

Can humans have extra vertebrae without noticing them?

In an answer to How important is it that a person be able to touch their toes?, someone said that they found out they had an extra vertebra from their chiropractor. I'm skeptical about their specific ...
41
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1answer
37k views

Can a blow to the base of the neck cause unconsciousness? (i.e., “Karate…CHOP!”)

Relating to Are one-hit knockouts possible? : It was a common trope in the 60s for heroes to knock out evildoers with a open-handed chop to the base of the neck (preferably accompanied with a high-...
50
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3answers
9k views

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 ...
21
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2answers
15k views

Are one-hit knockouts possible?

After stumbling upon a video of a guy getting knocked down in one hit, I did some quick research and couldn't conclude if this is a myth or not. The video in itself is very a compelling evidence for ...
13
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1answer
3k views

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, ...
6
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0answers
615 views

Does holding your stomach in prevent it from growling?

To save me from the embarrassment of a growling stomach my friend claimed that if I hold my stomach in, it restricts room for the stomach to move, and therefore cease its growling. Does this method ...
25
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1answer
14k views

If you put your hand in water while sleeping/drunk, will you pee yourself?

This is like an urban myth and a classic prank, but I never saw it in action. Supposedly if someone is passed out or sleeping, the contact with water will make him pee. Is this true? If true, why ...
11
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2answers
20k views

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?
4
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1answer
5k views

Could white spots under fingernails be an indicator of recent lies?

I heard it said that you could tell if someone had lied recently by looking at their fingernails. White spots indicated lies, with supposedly bigger spots indicating bigger lies. I've observed white ...
8
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1answer
2k views

Do metal items stick magnetically to “Magnet Boy”?

In the past week or so there have been several news articles from major news sources including this one from CBS about a boy that has apparent magnetic powers (metal things stick to him). Is it ...
13
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2answers
944 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 ...
17
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1answer
933 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?
32
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3answers
5k views

Does the brain use more energy during mental work?

There is the idea that mental work is tiring. Does the brain as a whole need to consume more glucose and oxygen when we are "mentally active"?