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 alcohol make you warmer? [duplicate]

A lot of people seem to think that they can walk around in t-shirts in midwinter after having a few drinks, and people often feel warmer after drinking alcoholic drinks. However, are they actually ...
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19 views

When someone's in a lake and lightning strikes the ground 100ft away what happens? [duplicate]

I was told if lightning strikes the ground surrounding a lake 100ft away, who ever is swimming in the lake will be electrocuted. I'm confused because I know if it strikes the water, you will not be ...
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0answers
147 views

Do anxious people have stronger body odor?

CalmClinic writes in Anxiety and the Connection to Body Odor: One of the main problems with the physical symptoms of anxiety is that many of them cause further anxiety. That's why so many people ...
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0answers
555 views

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
380 views

Does hair fall first from the top of head because of reduced blood supply due to lack of movement?

In this very quackery-like video, it's claimed that hair loss occurs first from the top of the head rather than the side because the latter moves when chewing or doing other facial movements. This ...
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1answer
958 views

If one man is shot in the head while holding a gun to another man, can the former get a shot off on the latter?

In the movies, the following situation is routine: One man is hunting down another. Upon locating him, the hunter points his firearm at the hunted's head at close range. At this very moment, an ...
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172 views

Can one permanently enlarge their breasts with the use of a breast pump?

There are many websites and products online that claim to have ways to enlarge a female's breasts. One common technique that they use is simply a vacuum pump. There's no denying that these temporarily ...
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76 views

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: ...
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1answer
211 views

Does the Graston Technique effectively treat limited mobility due to scar tissue?

The Graston Technique is a form of "cross fiber" massage with a metal instrument. The Graston Technique® incorporates an evidence-based form of instrument-assisted soft tissue mobilization that ...
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1answer
690 views

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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0answers
65 views

Does not wearing a coat when it's “cold” out make you sick? [duplicate]

I live in Maryland, where today it was about 50°F. I have heard this before, but my parents told me to wear my coat outside at school because the cold would "make me sick." Is it really true that ...
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1answer
328 views

Does lifting weights inhibit growth in kids?

I have a teenager at home, who is itching to pull weights in a gym. He is training to be a sprinter, so I see the benefits of power and strength training, but am worried, as these are his growing ...
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1answer
440 views

Can you tell someone is hungry based on stomach rumbling?

The stomach rumble (clearly audible sound caused by the digestive system's movements) is a common phenomenon, often believed to be indicative of hunger. It is also a common trope used in fiction to ...
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44 views

Do sports drinks such as Powerade and Gatorade help prevent or shorten hangovers? [duplicate]

Does drinking Powerade or Gatorade before, during or after consuming alcohol help prevent or eliminate hangovers? According to this article a pilot study was done that found nothing can help hangovers ...
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1answer
628 views

Has a human baby's heart started beating only 18 days after conception?

I saw billboards like this driving around Florida: 18 Days from conception my HEART was beating [...] Prolife Across America Is this true?
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1answer
1k views

Does defecating while sitting cause more strain than squatting?

This commercial1 from "Squatty Potty" claims that evacuating stool in a seated position is suboptimal for humans because we have a muscle that partially pinches the colon when seated. They claim that, ...
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0answers
80 views

Getting ill because of staying in a draft/draught? [duplicate]

In Germany it’s a common belief that drafts/draughts can make you ill (e.g., getting a common cold). Because of that, car and train windows typically get/stay closed, even when it’s really hot; and, ...
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130 views

Do Vacuum Constriction Devices (penis pumps) work 50-80% of the time for erectile dysfunction?

The authoritative WebMD site has an article Erectile Dysfunction: Vacuum Constriction Devices: A vacuum constriction device (VCD) is an external pump with a band on it that a man with erectile ...
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543 views

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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1answer
495 views

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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0answers
116 views

Pedometers / fitness trackers and setting stride length from your height - how accurate? [closed]

Looking at a couple of pedometer instruction leaflets, from different manufacturers, and spotted that they both suggest you can approximate your stride length from your height via the following ...
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1answer
897 views

Does drinking coffee or tea dehydrate you?

It is widely claimed that despite being made mostly of water, drinking coffee or tea will actually dehydrate you, because the caffeine is a a diuretic. Here is an example from the SFGate news site ...
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1answer
3k views

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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1answer
5k views

Can a camera flash blind the eyes of a baby?

This story in the Daily Mail talks of a case where a newborn baby lost its eyesight due to the camera flash. Doctors said the three-month-old, who has not been named, has suffered irreparable ...
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222 views

Will stretching help me have lean, shapely muscles? [duplicate]

I read that after exercising, we should stretch our muscles so that they won't be bulky but instead be long and lean. Is this true? Edit: The question is more about aesthetics than whether stretching ...
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0answers
627 views

Is female squirting involuntary urination? [closed]

During sex some women have a phenomenon called squirting that happens, when they release a large amount of fluid during sex. Recently I have been seeing people stating that squirting is involuntary ...
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0answers
78 views

Was this video about a person who can withstand electricity staged? [duplicate]

This video, which is apparently by History.com Channel, shows a man called "Electric Mohan" from Kerala, India who doesn't get harmed when electricity flows through him. Is it possible for any human ...
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1answer
2k views

Does your brain keep thinking for seven minutes after you die?

There is a widely published meme that you keep thinking after you die: After you die, it is believed that you have 7 minutes of brain activity left inside you Obviously it doesn't hold ...
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1answer
3k views

Can someone get pregnant merely by using the swimming pool?

This Daily Mail story says that a woman went to court as her daughter got pregnant by swimming. A mother is suing a hotel claiming her teenage daughter fell pregnant simply from using a hotel ...
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2answers
401 views

Do dietary vitamin supplements like Berocca help improve mental performance?

Berocca is a dietary supplement containing mainly B vitamins and a large dose of Vitamin C. Here's a listing from their website for Berocca Perfomance: Vitamin B1 15 mg Vitamin B2 15 mg ...
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1answer
2k views

Does chugging Gatorade before going to sleep prevent a hangover in the morning?

Is drinking Gatorade after a night of drinking an effective method for preventing hangovers? A Forbes article claims: Sports Drinks You not only lose water when you booze, you also dump ...
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0answers
2k views

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 ...
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1answer
5k views

Did an experiment show none of 680 Air Force cadets were of “average” size?

Various workshops given by Nielsen-Norman Group in the User Experience field, mention a specific experiment that involved Air Force cadets. The experiment is meant to illustrate the point that ...
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1answer
1k views

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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387 views

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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0answers
64 views

The Yogi that Never Eats, is it true? [duplicate]

A few years ago a yogi from India made the headlines claiming that he hadn't eaten for over 7 decades. It was said that he was under observation for 2 weeks in a hospital and allegedly was never seen ...
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1answer
284 views

Does exercise affect the number of muscle cells?

Washington.edu reported that: Muscle cell number is affected by exercise level while young and elitefitness.com said: a trainee in the early stages of training would increase cell number ...
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8answers
23k views

Could people perceive the color blue in ancient times?

This article claims that no ancient language anywhere in the world had the word for "blue", that for instance Homer described the sea as "wine-dark", and that the color blue has only appeared more ...
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1answer
955 views

Does the human body crave missing vitamins?

My mother has told me that if your body needs a certain vitamin, you will find you feel like eating fruits that include that vitamin. For example, if you have lack of Vitamin C, you'll get a craving ...
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2answers
595 views

Does the nose stop smelling a scent after a few minutes?

A teacher once told me that after detecting a new scent, you will only be able to smell it for a few minutes. Is this true? If so, why? What is the precise length of time one can smell, and does it ...
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240 views

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 ...
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721 views

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] ...
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1k views

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, ...
10
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1answer
75k views

Is the reason for crying related to which eye releases tears first?

Recently I had a glance at this post from #8Fact on Facebook claiming that when you cry out of happiness, the first tear drop comes from your right eye, when you cry out of pain it comes from your ...
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286 views

Could pain through stretching increase general pain tolerance?

I found a how-to guide (not exactly a reliable source, I know) that claims that e.g. stretching your legs to the point of pain to increase flexibility also increases your general tolerance to pain: ...
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0answers
299 views

Does sleeping in a cold room reduce the risk of diabetes?

According to Elite Daily, there may be some health benefits to sleeping in a room at between 60-67°F (15-19°C) In particular, they cite Temperature-acclimated brown adipose tissue modulates ...
4
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1answer
405 views

Do humans normally pass gas 6 to 21 times per day?

10 Fascinating Facts About Farting People Pass Gas About 14 Times Per Day Fart, Burp, and Embrace Gas! Catapulting gaseous elements out of your orifices 13 to 21 times a day is average. ...
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1answer
1k views

Do specific exercises target specific fat deposits?

It is common to see marketing for exercise routines that claim to target fat deposits in a particular part of the body. Examples: 9 Moves to Beat Belly Fat for Good 8 moves to melt off that pesky ...
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2answers
568 views

Can a person “suspend their pulse”?

The Wikipedia article about Tirumalai Krishnamacharya, the "father of modern yoga", claims During the 1920s, Krishnamacharya held many demonstrations to stimulate popular interest in yoga. These ...
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1answer
18k views

Does raising your arm in the air help when you are coughing/choking on something?

When I was younger I once choked on some food and started coughing heavily, my Dad then told me to raise my arm in the air in order to "help raise the diaphragm". It actually helped with the coughing ...