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
975 views

Is the runner's high a real phenomenon?

Photo by Nathan Rupert - via Flickr The claim is as follows: A publicized effect of endorphin production is the so-called "runner's high", which is said to occur when strenuous exercise takes a ...
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1answer
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Do bras prevent you from getting saggy boobs?

I've heard this one repeated by women I know a few times, but it sounds like a product of confirmation bias to me. Is there supporting evidence for the claim that if you don't wear a bra you should ...
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Is there a relation between brain physiology and gender identity?

I recently came a cross a blog post that talked about DSD or Intersexuality as they rather call it. One of the claims that was made is that gender identity (that is, whether I think of myself as male ...
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1answer
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Does electricity grab?

It is said that if someone accidentally touches a powerful electric source, they get stuck to it and often die due to the same effect. Is it true, or it is just a perception of the affected person?
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Does plucking/epilation impact hair growth?

I've recently encountered the idea that plucking an area of hair (say, with tweezers) causes the hair to grow back thicker/denser/stiffer etc. yet I remain skeptical. This concept is rampant with ...
18
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2answers
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Does long-term use of MDMA (“Ecstasy”) cause cognitive impairment?

The MDMA page of Wikipedia currently states: A meta-analytic review of the published literature on memory show that ecstasy users may suffer short-term and long-term verbal memory impairment—with ...
20
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3answers
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Do you feel pain in a life-threatening situation?

Let's say you are in a war-situation, and both you and your opponent are out of bullets. When I was in the army, I learned that the most efficient way to kill your opponent would be to kick him in the ...
15
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2answers
5k views

Does brain mass have any correlation to intelligence?

According to many (I cannot find a source at the moment), Albert Einstein's brain weighed less than average. It is a common belief that there is no correlation between brain mass and intelligence. Is ...
29
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3answers
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Do either men or women have higher pain tolerance than the other?

Traditional folklore suggests women have a higher pain tolerance than men. I have seen a few sites suggesting otherwise. Naturally, plenty of anecdotal accounts of wussy men or women get tossed around ...
21
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1answer
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Do monkey bars make you taller?

My mom -- a doctor -- and my relatives seem to think that hanging off monkey bars make you taller as it "stretches" your spine. I seriously doubt if this is true, unless you hang off monkey bars 24/7....
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3answers
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Is there a correlation between penis size and race?

I recently saw this video, where among other things they claimed that there is no correlation between penis size and race. Is this true? I don't remember everything about the video. It was animated, ...
35
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1answer
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Reading while lying down is more strenuous (unhealthy) for eyes

My friend heard that reading while lying down is more strenuous (unhealthy) for eyes. I like reading in bed (books, tablet). Is there some study that confirms this hypothesis? I use two positions (...
21
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3answers
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Is excessive use of chewing gum bad for you?

Chewing sugar-free gum is good for your teeth. But what about the rest of your body? Would constantly chewing gum have any negative effects? An argument I have heard is that the increased amounts of ...
13
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2answers
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Do taste buds become less sensitive as you get older?

I've heard it explained that your taste buds become duller as you get older and that is why I can now eat things like carrots and mushrooms that I used to think tasted like garbage. Is it true that ...
10
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1answer
591 views

Is flatus flammable?

Wikipedia deems this topic significant enough to merit its own article: Fart lighting, or pyroflatulence, is the practice of igniting the gases produced by human flatulence, often producing a flame ...
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3answers
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Is there evidence that early humans hunted by running in packs over long distances to wear out their food?

As put forth by Christopher McDougall in the book Born to Run (more recently in a TED talk) and a number of recent articles.
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6answers
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Are different prices in wines justified by taste?

According to the BBC, Wine costing less than £5 a bottle can have the same effect on the palate as those priced up to six times as much, a psychological taste challenge suggests. My skeptic sense ...
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2answers
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Is the human menstrual cycle related to the lunar cycle?

I've heard that the female menstrual cycle follows a pattern of the lunar cycle, mostly as an evolutionary adaptation so that menstruation (and hence detectability by predators because of the smell of ...
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3answers
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Is stretching beneficial after exercise?

A quick internet search on stretching reveals that, if physiologists were a bit more belligerent, the question of whether or not to stretch after exercise is something actual wars could be fought over....
23
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1answer
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Do mechanical techniques for penis enlargement work?

According to several different penis enlargement companies, and an unsourced claim on Wikipedia, men have been trying to enlarge their penis for over 2,000 years. Over the years, many different ...
29
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2answers
9k views

Do non-FDA approved “male enhancement” pills work?

The airwaves and Internet are full of advertisements for "male enhancement" products: magic pills "guaranteed" to enlarge your penis and increase your sex drive. For example, ExtenZe, perhaps the ...
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3answers
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Is it possible to “die instantly”?

Lots of times, when some great tragedy occurs, one often hears journalists and bystanders alike softening the blow of having some person die by saying something like "at least they died instantly" or "...
16
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1answer
876 views

Do silicone breast implants cause health problems?

An article in Business Week Magazine (June 10, 1991, but can't yet find a link) kicked off a debate that raged throughout the 90's. It stated that silicone breast implants manufactured by two Big ...
55
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3answers
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Can black people, on average, jump higher than white people?

Most people hear this in one form or another at some point in their life, especially those kids who play basketball. Even videos of white guys who have excellent jumping ability stress the fact that ...
21
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1answer
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Does drinking water upside-down help cure hiccups?

I was under the impression that drinking water upside-down worked for curing hiccups (when they worked) merely due to a placebo effect, or at the very least didn't work any better than just drinking ...
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4answers
6k views

Is there any explanation for a near-death experience?

One idea I used to hear a lot about was that when people are near-death and saved by medical science that they sometimes see "a light at the end of a tunnel" in a vision. Today I read about an ...
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Any validity to palmistry?

Unlike fortune-telling techniques, palmistry (or palm reading) has a potential connection with reality. Are there any studies that relate any personality traits to shapes of the hand, or lines?
29
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1answer
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Does blood type affect what type of food is best for you?

I remember that, a few years ago, my parents were told that different blood types need to eat differently. From a quick look online, it seems to be called "Eat Right For Your Type." It claimed that, ...
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2answers
4k views

Can blood group affect behavior?

In Japan, blood group is believed to have ties with behavior. Is there scientific evidence for it?