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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Is there a 29.5 day cycle of neutrotransmitters released from the claustrum in our brains?
According to multiple 'spiritual' websites (like this one), there is a 29.5 cycle in the human body.
Every 29.5 Days, A Seed Is Born That Gifts You With An Opportunity For A Physiological & ...
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Does the body manage to eliminate ethylmercury far more efficiently than it eliminates naturally occurring methylmercury?
STATNews wrote in Correcting Robert F. Kennedy Jr.’s vaccine ‘facts’:
The human body eliminates ethylmercury from vaccines far more
efficiently than it eliminates naturally occurring methylmercury.
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Is capsaicin (found in chili peppers) an aphrodisiac?
Various web-sites claim that consuming capsaicin (the chemical found in chili peppers which makes them hot) has an aphrodisiac effect:
From berries.com:
Capsaicin is known to boost testosterone ...
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Can the Bajau people stay underwater for as long as 13 minutes?
National Geographic 4/2018: 'Sea Nomads' Are First Known Humans Genetically Adapted to Diving claims:
But a group of people called the Bajau takes free diving to the extreme, staying underwater for ...
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Does watching pornography increase sexual performance in women?
I am referring to these lines:
A recent study reported that increasing porn use is linked to
decreased sexual performance in men and increased sexual performance
in women.
Big Think - Is watching ...
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Is foot pronation a predictor for injury? Can it be corrected with shoes?
Retailers of running shoes talk about "pronation" and the risks it causes and how shoe choice can help.
For examples, Asics claim:
Pronation refers to the way your foot rolls inward for ...
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Did Haribo sugar-free gummy bears cause a man to lose bowel control in a Toronto airport in April 2013?
So, I recently saw a Youtube video (warning: potentially NSFW; contains a graphic description of gastrointestinal distress and the loss of bowel control) that reads aloud the text of an Amazon review ...
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Can small amounts of exercise build muscle?
I have run across a number of exercise routines which claim individuals can lose weight and build muscle with very little exercise.
So, the question: Can an average person become ripped in three ...
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Does this medical study prove that wearing gold is harmful? [closed]
So I have this article that was sent to me by a friend of mine and it pertains to a ruling in the Quran (that declares that silk and gold are forbidden for men to wear). So the article claims that ...
user59726
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Does the heart pump blood through arteries? [closed]
The conventional model of the circulatory system assumes the heart pumps blood out of the ventricles through a series of progressively branching arteries of decreasing diameter transitioning to ...
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Can mattresses relieve scoliosis pain?
I found a lot of reviews of mattresses that claim they can help with back pain from scoliosis. I was really surprised because I haven't heard about them before.
Here are some examples:
...
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Did the Chinese chairman Xi Jinping carry 100 kg of wheat and walk 5 km of mountain road without switching shoulders?
In the first episode Liang Jia He (Chinese: 梁家河篇) of the series Chairman Xi's Beginning (Chinese: 習總書記的初心), Xi said (in Mandarin Chinese)
因爲我那時候，抗 200 斤麥子，十里山路不換肩的
... because I, at that time, ...
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Does slapping parts of your body increase blood flow and help with physical activity?
I have believed for quite some time that slapping limbs is "good for blood circulation", without ever looking more into it. After getting curious about it, I found a lot of claims that it's ...
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Do people carry around up to 20 lbs (9 kg) of poop?
The claim from this site:
It’s been said that the average American carries around between 5-20
extra pounds of poop in their intestines.
It's hard to believe it's true. Is there a medical evidence ...
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Does synthetic vitamin C contribute to the formation of genotoxins that can lead to cancer?
While researching Vitamin C supplements, I noticed dozens of people outraged about various companies slipping in "synthetic vitamin c" (ascorbic acid). From what I can tell this aversion ...
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Are blue light filters, not blue lights, on phones and computer screens harmful to sleep?
These existing questions ask whether the blue lights, not blue light filters, from computer screens affect sleep:
Does blue light from screens (phone, computer, TV) before sleep affect sleep?
Does ...
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Do dramatic cases of body shaking and trembling in religious settings have supernatural causes? [closed]
There are many examples of people experiencing dramatic body shaking and trembling in religious settings, such as the ones below:
Example 1
Example 2
Example 3
Example 4
Example 5
Example 6
Example 7
...
user56618
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Can the human body significantly build muscle while losing body fat?
The fitness community often says that you can't slim down and build muscle at the same time. The reason for this is said to be that the body is in a “catabolic state” with calorie deficit. In order to ...
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Does it take two weeks for a single man to produce enough sperm to impregnate every fertile woman on Earth?
Fact Slides has a slide that claims:
A single human male produces enough sperm in two weeks to impregnate every fertile woman on the planet.
It sources a book of random facts
Is it true?
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Static contraction training: is working out for 25 seconds once a month enough to build muscle?
According to conventional wisdom, in order to get results in a timely manner, one should train multiple days a week lifting weights for several sets of 1–5 reps for strength and 6–12 reps for ...
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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,...
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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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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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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 ...
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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 ...
user16959
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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 ...
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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 ...
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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 ...
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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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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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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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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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Did The Lancet publish an account of a woman who did not age?
Mary Baker Eddy, the founder of the Christian Science religion, claimed in Science and Health with Key to the Scriptures*, Ch. 8, p. 245:1-15:
The error of thinking that we are growing old, and the
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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 ...
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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