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Results tagged with human-biology
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user 1913
This tag is for questions about the general biological features of human beings (as opposed to the biology of non-humans).
3
votes
1
answer
771
views
Why do cells have an average 'life span'
I've heard of Henrietta Lacks. As a result of a genetic mutation, her cells never died. I've heard/read that overtime, our cells stop multiplying as much, (as an effect of aging). Why? Why do we age? …
- 180
1
vote
1
answer
2k
views
Why does shaving dehydrate the skin? Is there an hormonal effect involved?
I want to understand why the face becomes dry after shaving and if shaving affects hormones? I've heard that after shaving, hair grows back faster, why? Shaving damages hair follicles and they become …
- 180
3
votes
1
answer
798
views
The fundamental importance of R.E.M. Sleep. (Rapid Eye Movement)
Question:
I know that experiments have been conducted to determine the importance of R.E.M. sleep in our sleep cycle. It is particularly important for learning, information synthesis, and recovery fro …
- 180
6
votes
Accepted
What prevents a pregnant woman's immune system from recognizing her fetus as nonself (and at...
Just so that someone answers this question so that the moderators have less work to do:
The fundamental reason why embryos don't get massacred by the maternal immune system is because of the placent …
- 180
4
votes
2
answers
632
views
Effects of exercise on the brain
I am well aware of the phenomenon of neurogenesis induced by exercise, as well as the dopamine release that results from exercise. I am really interested in neuropsychology and the effects of exercise …
- 180