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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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What do we know about the P-DTR method? [closed]

TL;DR: P-DTR (Proprioceptive Deep Tendon Reflex) is supposedly a neurological (physiological) method for assessment and treatment of hypertonic (overly tense) muscles. Due to lack of publications; ...
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1answer
307 views

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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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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1answer
11k views

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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326 views

Does carrying or consuming onions help to prevent heatstroke and/or reduce your body temperature?

Will consuming onions help to reduce your body temperature, or prevent heatstroke? Some common variations of this claim include applying onion juice to your skin, or even just carrying an onion in ...
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1answer
13k views

Did the study mentioned by “The virginity fraud” TEDx Talk happen?

During 2017's TEDx Oslo Talk The virginity fraud, the presenters refer to a (supposed) study on the reliability of virginity testing around 9:15 mark: The absurdity of virgin testing is illustrated ...
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1answer
804 views

Does the “4-7-8” method help to fall asleep faster?

The "4-7-8" technique involves controlling your breath for a brief time to encourage falling to sleep faster. Each number consists of the period of seconds you spend during a certain part of ...
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758 views

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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879 views

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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283 views

Does orientation relative to the Earth's magnetic poles affect humans during sleep? [duplicate]

So generally in India they told you, you should not put your head to the north and sleep. [...] Suppose you are anemic and you go to your doctor what does your doctor prescribe for you? Iron. ...
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517 views

Are Indians immune to Israeli stink bombs?

Russian Television network, RT report that: An Israeli crowd control stink bomb known as the Skunk, which smells like raw sewage and rotting bodies, destined for employment in the restive region of ...
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5answers
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Can venomous snakes be determined by these pupil, nostril and scale patterns?

This image was recently shared by an Australian Facebook friend: The source appears to be a Facebook post of a man from India with a staggering 380,000 shares from around the world! There are ...
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1k views

Does playing basketball help you grow taller?

Some people believe that playing basketball encourages you to grow taller. For example: A Scientific Theory On Why Playing Basketball May Indeed Make Young Teenagers Increase In Height And Grow ...
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181 views

Does dark chocolate benefit athletic performance?

Dark chocolate has been "proven" to increase the performance of (amateur) athletes competing in endurance sports. Some sources: fitnessmagazine.com Deakin University The Telegraph ... and many more. ...
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1answer
1k views

Is there a point of no return when starving to death?

I was looking at this image on Wikipedia of two children during the Russian famine of 1921-1922. The caption reads (my translation): Famine in Russia. III. The two stages of hunger: the skeletal ...
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1answer
569 views

Are there as many neurons in the human gut as there are in the head of a cat?

I've got a gut-related condition and saw this claim on the BBC [The stomach's] complex work is under the control of what's sometimes called "the little brain", a network of neurons that line your ...
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873 views

Has anyone used yoga to live for supernatural lengths of time?

According to this commentary on the Bhagavata Purana by Swami Prabhupada: By controlling the breath, the perfect yogī can continue his life for as long as he likes. Sometimes we hear from the Vedic ...
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1answer
550 views

Were humans placed on Earth by aliens?

This 2013 Daily Mail article quotes the claims of the book Humans are not from Earth: a scientific evaluation of the evidence by Dr Ellis Silver. A U.S. ecologist has claimed that humans are not ...
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1answer
2k views

Does running cold water on your wrists cool you down rapidly?

It's that time of year where I've started to hear it repeated that running cold water over your wrists is a way to rapidly cool down. The theory goes that blood is close to the surface in this area ...
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1answer
1k views

Is 1,7% of the population born intersex?

Article published by the BBC claims: Although there are no reliable statistics on how many Kenyans are intersex, doctors believe the rate is the same as in other countries - about 1.7% of the ...
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1answer
1k views

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
12k views

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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1answer
2k views

Does eating burnt toast neutralize ingested poison?

A doctor told me today that eating burnt toast along with tea is a remedy for poison. Apparently the burnt part of the toast acts like activated charcoal and adsorbs the poison you've ingested, and ...
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1answer
450 views

Did Einstein's brain weigh less than the average?

Many web-sites claim that Einstein's brain was smaller than average. For example, in this 2005 phys.org article: Einstein’s brain weighed only 1,230 grams, less than the average adult brain which ...
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1answer
1k views

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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0answers
151 views

Can you power a smartwatch by your body heat? [closed]

I stumbled across this indiegogo page for a new kind of smartwatch. It promised to that you never have to charge it because it will be powered by your body heat. Now i'm wondering, can you really ...
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292 views

Are left-handed people better at mathematics?

During a math exam, I was told: "You are left-handed, you should become a mathematician." I searched online and, sure enough, there are some web-sites claiming that left-handed people tend to be ...
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231 views

Did György Sherfezi fall from the 10th floor on a passing Laszlo Karvasha and both survived?

Some researchers of Coincidence insist on the veracity of the story: "A resident of Budapest György Sherfezi fell out of the 10th floor window and landed on a passing Laszlo Karvasha. Exactly one ...
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1answer
2k views

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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0answers
4k views

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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2answers
614 views

Do some people have aphantasia - the inability to visualise images in their mind's eye?

Blake Ross wrote an article about his personal experience with aphantasia, which is defined here as: a condition where a person is unable to visualise images in their minds eye. Has it been ...
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0answers
229 views

Is a highly variable diet better than a steady one for human health?

Nicholas Nassem Taleb has argued that many systems become more robust when subjected to random shocks (a property he calls Antifragile in his book of that name). One of the systems he applies his ...
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1answer
870 views

Does it take time for the brain to realize that you have eaten too much?

A doctor told me to eat my meal only until I feel 3/4th full. The logic being that the stomach takes time to absorb the food and the brain takes time to register that fact and the signal that I have ...
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0answers
55 views

Can Methylsulfonylmethane make human hair grow faster? [duplicate]

There is this other question: Is sulfur a "miracle cure"? But it received zero answers at the time of this posting, so it is not a valid duplicate target. The claim therein also is too broad....
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3answers
1k views

Does men's testosterone increase with age?

It is generally thought that men's testosterone decreases with age. However, according to Des Tobin, Professor of Cell Biology at the University of Bradford: Surprisingly the levels of ...
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1answer
429 views

Does consuming foods rich in phytic acid prevent mineral absorption?

I've seen a lot of articles warning that consuming phytic acid can prevent the body from absorbing minerals. They recommend soaking beans, chickpeas, lentils and other phytic acid foods before cooking ...
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0answers
267 views

Do swimmers' lungs use oxygen up to 3 times more efficiently than an average person?

I've come across a statement which is the following : At their peak, swimmers' lungs will use oxygen three times more efficiently than an average person. First time I saw it was on wikihow's page ...
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1answer
458 views

Different Human species? [closed]

Are humans only one species or Africans, Asians, Europeans, Mongolians etc are different species? They differ drastically in appearance.
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0answers
410 views

Does exposure to cold make body fat easier to burn? [duplicate]

The Facebook pages Weird Facts and WTF recently posted this image. Exposure to cold makes body fat easier to burn. Scientists found that putting ice packs on problem areas can burn extra calories. ...
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1answer
832 views

Does the body get rid of alcocol first before metabolizing food?

In her article The Top 8 Metabolism Myths, the nutritionist of Fitbit writes Go easy on the booze, too; your body will focus on getting rid of the alcohol first, before metabolizing the food. Is ...
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1answer
789 views

Are sexual/romantic characteristics correllated with blood type?

I saw this assertion on many sources, here's one: http://www.japanzine.jp/article/jz/521/love-sex-blood-types Many Japanese people believe that just as different blood types are incompatible, so ...
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1answer
614 views

Do certain colors fatigue eyes faster?

This UX.SE question about the use of bright pink in graphic design prompted an answer that says it should not be used because “it hurts the eyes.” It cites a Color Matters website about this, and ...
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1answer
517 views

Do male human brains have better global efficiency than female human brains and female brains have better local efficiency in the right hemisphere?

Wikipedia writes in Lateralization of brain function: Significant differences between male and female hemispheric rivalry and dominance have been established. Male brains have significantly better ...
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1answer
1k views

Does soaking in natural hot springs have any health benefits when compared to soaking in heated non-spring water?

There exists a common belief that soaking in natural hot springs has significant health benefits. For example, Hotelexecutive.com claims that: So What Exactly Can Soaking in Natural Hot Springs Do? ...
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0answers
32 views

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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1answer
710 views

Can anxiety increase 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
7k 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
471 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
2k 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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0answers
304 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 ...