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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11
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1answer
3k views

Is the 100m winner the “fastest man”?

The winner of the 100m sprint is often labelled the "fastest man on the planet". Often the average speed over the race is given, but the peak speed seems to reflect the description better. Is there ...
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Do Hubbard Electrometers (E-meters) detect emotion about past experiences?

I saw a table set up for "Free Stress Test" that someone was sitting at looking forlorn because everybody was walking past. I asked how it worked and she got me to sit down with these two cans ...
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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 you tell someone has seen combat by looking at their face?

There is a common claim that, by looking into the face or eyes of a person, you can see that they have seen combat, or other traumatic events. It is particularly mentioned in movies, songs and poems. ...
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Is running anti-clockwise easier than running clockwise?

Athletics events that take place on a track are always run anti-clockwise (IAAF Track and Field Facilities Manual, section 2.2). There has been some discussion in the letters page in The Telegraph ...
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Do facial expressions cause wrinkles?

Some of my friends think that e.g. smiling leads to having wrinkles around your mouth, where your skin folds when you smile, but I'd also count if someone works in the sun a lot an thus squints all ...
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Does willpower depend on the amount of glucose in the body?

How strong is the evidence for the argument made in Willpower by Baumeister and Tierney? Basically willpower (or better: "self-control") is supposed to be proportional to the amount of glucose in ...
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Can a woman become pregnant through splash pregnancy?

I have read that there is something called "splash pregnancy" which is when you get pregnant without having penetration. So far I have only found anecdotal stories about it, but is there any ...
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Does Pavan Mukta Asana help releasing gastrointestinal gas?

Pavan Mukta Asana As mentioned above, practicing the purvana-mukta-asana will help to release gastrointestinal gas. It is also improves other gastrointestinal problems like upset stomachs and ...
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Do side sleeping postures contribute to breast sagging?

CNN claims that sleeping on your side and sleeping on your stomach can lead to saggy breasts. Sleeping on your side can cause you to get wrinkles," Glaser says. Blame all that smushing of one side ...
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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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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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Are people taller in the morning than at night?

I've heard this claim quite a few times and have even repeated it as fact. The basic claim is that 'gravity compresses the spine' during the waking hours and since (most people) sleep at night, they ...
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Does diet affect the taste of semen?

After reading the latest explosm comic I realized that I often heard about this claim, but never read anything drawing from credible sources. Eating pineapples makes semen taste better. On the ...
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Does neosporin reduce scarring?

It is a widely held belief, and oft-advertised property of neosporin that its use reduces scarring, especially as opposed to other triple antibiotic ointments. For example: Livestrong Neosporin ...
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Can decompression after diving cause you to explode?

On the tv show "1000 Ways To Die", a death that is mentioned (Season 1, episode 10, death #710) claims that a girl exploded from what would seem to be decompression poisoning A female scuba diver ...
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Will a worm, cut in half, survive as two worms?

I have often heard the story that if you cut a worm in half in the middle, both halves of the worm will grow the other part back, and you will eventually end up with two worms. Is this true?
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Can GAPS diet cure autism, schizophrenia and dyslexia?

I have read a lot of claims regarding GAP syndrome and GAPS diet with the most surprising of them being that the proposed diet can even cure disorders such as autism and schizophrenia. For example in ...
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Can you break a person's neck with a manual head twist?

In a move often seen in action movies (very often!), someone takes the head of another person with both hands, usually from behind, and twists it only once or twice in order to break their neck. A ...
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Are bone conduction headphones safer with regards to hearing loss?

In this video, at about 1:35, a claim is made that bone conduction headphones are safer with regards to hearing loss, because the sound doesn't "affect the eardrum". Is that true? I thought hearing ...
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Does your heart skip a beat when you sneeze? [duplicate]

Possible Duplicate: Does your heart stop beating when you sneeze? In this answer to the question Does your heart stop beating when you sneeze? it is stated that your heart can skip a beat ...
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1answer
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Did an elderly Chinese woman grow horns?

This video shows a news report of a woman in China who has apparently grown a horn at her old age. Is this a deformity, or some sort of video trick? Is this a scientifically sound phenomenon?
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Are people still concious after beheading? [duplicate]

Possible Duplicate: Does one remain conscious after decapitation? Is it true that after you are beheaded, you are still concious for a few seconds, and you can see everything around?
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Does pre-ejaculate typically contain sperm?

It is typically believed that pre-ejaculate contains sperm, for example Guys leak a bit of sperm out of the penis before ejaculation. This is called pre-ejaculate. source Does a man's pre-...
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Would an eyemask obscure a persons identity?

Often in movies and comics characters wear a simple mask around the eyes, which seems successful at hiding their identities. Examples would be Zorro, Green Lantern, Robin Image source Is there any ...
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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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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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Are all cells of the human body completely replaced every seven to ten years?

It have heard several times that, every seven to ten years, all the cells that our body are made of have all been replaced. Example in this NY Times Article This heartening truth, which arises from ...
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Are sea salt soaks beneficial for healing a body piercing?

Aftercare suggested for healing a new body piercing almost always includes a sea salt soak. Wikibook's Body Piercing Aftercare explains the process. 'SSS (Sea Salt Soaks)' – With this method you ...
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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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Was Einstein's brain physiologically different?

Einstein's brain has been the subject of much debate and speculation, because of his notable and exceptional contributions to our understanding of the universe. The claim exists that his brain may ...
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Are simian lines and personality correlated?

First, to define what a Simian Line is, I will quote from the Wikipedia page. In humans, a single transverse palmar crease is a single crease that extends across the palm of the hand, formed by ...
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Does training while wearing weights improve body performance?

Everybody has heard about training while wearing weights in different parts of your body: ankles, arms, torso, etc. There are many references in cartoons that treat about Martial arts like the ...
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Do raster glasses work for improving eyesight?

Similar Questions: Is the Bates Method for improving eyesight efficacious? Strange way of improving eyesight — Could it work? Do raster glasses, like these, work for improving eyesight (if you are ...
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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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Does a lobster feel little/no pain when boiled alive?

Image Source I have just read Cracked.com's "9 Ridiculous Cooking Myths You Probably Believe", that claims: [...] because [the lobster's] nervous system isn't very complex, so it's feeling little ...
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Does playing chess burn as many calories as running?

I heard once that when two Chess Grandmasters play a five hour game of chess, the intense concentration and focus they have causes their bodies to burn as many calories as someone playing a sport ...
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Does wearing summer clothing during the winter increase your tolerance to the cold?

My dad could tolerate long periods of time outside during the winter while wearing shorts and a t-shirt. He told me he started wearing warmer-weather clothing during the winter, and eventually his ...
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Is homosexuality genetic or can it be unlearned in one of those (christian) camps [duplicate]

Possible Duplicate: Is homosexuality innate? I suppose I was trying to be tad too PC earlier. I've seen quite a few anti-gay person saying that homosexuality is something that is learned and can ...
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Do Vitamin B1 patches prevent mosquito bites? [duplicate]

Possible Duplicate: Is Vitamin B12 an effective mosquito repellent? This Denver Post article suggests that mosquitoes dislike biting people who have excess vitamin B1. The notion behind the ...
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Are ergonomic keyboards better for your health?

Popular consensus seems to be that ergonomic keyboards (with the middle split or curve) are better for your physical health than standard keyboards, and reduce the likelihood of carpel tunnel syndrome ...
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Will taking yeast infection medication build resistance if one doesn't have a yeast infection?

A female friend recently commented that women should never self diagnose yeast infections because if they don't actually have one and proceed with some kind of treatment, some kind of resistance will ...
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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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Does a typical human on a western diet have undigested protein stuck in their body from years of eating certain foods?

Last night I watched the movie Fat, Sick, and Nearly Dead. The movie followed two unhealthy people who suffered from a chronic disease on their juice fasts and subsequent lifestyle changes. Their ...
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Did a man survive a 30mph fall from a tornado without breaking a bone because he was unconscious?

This segment of the television show "Human Body: Pushing The Limits - Episode 1 - Strength" claims a person was sucked up by a tornado, and when he fell out of it he broke no bones because he was ...
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Should we drink water before we feel thirsty?

The claim is that we should be drinking water routinely to the point that we never feel thirsty, and that to not be doing so is to our detriment, at least enough for the notion to be popular amongst ...
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Does eating chocolate make you high?

This page, as well as many others, says: Like other palatable sweet foods, consumption of chocolate triggers the release of endorphins, the body's endogenous opiates. Enhanced endorphin-release ...
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Does a vinegar bandana help against tear gas?

In the context of the "occupy" protests, I've head a couple of times that you should carry a bandana or cloth soaked in vinegar with you, and in case the police uses tear gas/irritants, you should ...
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Do you use only 14 muscles to smile but 43 to frown?

I have heard this claim many times You use 14 muscles to smile and 43 to frown But I have never seen any actual proof of this and always assumed it was just one of those midwest folksy sayings. ...
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1answer
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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 ...