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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77
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1answer
12k views

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,...
8
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1answer
401 views

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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710 views

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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0answers
140 views

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 ...
3
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1answer
480 views

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 ...
4
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2answers
461 views

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 ...
25
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2answers
2k views

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 ...
11
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1answer
663 views

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 ...
5
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1answer
804 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 ...
9
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1answer
749 views

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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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 ...
2
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1answer
423 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 ...
42
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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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498 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 ...
44
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1answer
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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 ...
6
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1answer
875 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 ...
18
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1answer
2k 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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0answers
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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 ...
2
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0answers
286 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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548 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 ...
45
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5answers
8k views

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 ...
13
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0answers
6k 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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0answers
187 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. ...
27
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1answer
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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 ...
7
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1answer
596 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 ...
4
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0answers
882 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
587 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 ...
6
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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 ...
8
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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 ...
7
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1answer
2k 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 ...
12
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1answer
24k 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 ...
4
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1answer
3k 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 ...
5
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1answer
485 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
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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 ...
2
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0answers
167 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 ...
3
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0answers
314 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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0answers
239 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 ...
13
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1answer
4k 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 ...
6
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0answers
6k 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 ...
5
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2answers
677 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
242 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 ...
16
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1answer
973 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
57 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 ...
5
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1answer
535 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 ...
5
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0answers
275 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
506 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
444 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. ...
8
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1answer
1k 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 ...