This is a serious question. I really want to know the answer. I'm looking for a biological answer for this question. Thank you
2006-11-07 09:07:47 · 6 answers · asked by Dastfreadsv 2 in Science & Mathematics ➔ Biology
It is an extremity and requires blood to maintain the proper body temperature. Extra blood going there to increase the temperature makes them hard
2006-11-07 09:13:33 · answer #1 · answered by Anonymous · 1⤊ 1⤋
Your nipples have hair follicles on them, just like the rest of your skin (except your lips, eyelids, etc.) Anyway, the reflex is called piloerection, or more commonly, goose bumps. There is a tiny muscle at the base of the hair which pulls it up in response to cold temperatures, or fear. Why do we have this reflex? Millions of years ago, where we were not 'naked apes' but instead had coats of fur on our bodies, the relflex would 'fluff' up the hair, trapping the warmed air against our skin and keeping us from getting cold. it also made us look larger if we were in a potential fight or flight situation. (look at a picture of a typical 'halloween cat' for a classic example of the piloerector response)
Your 'headlights' go on in response to the cold, just as if we still had those fur coats.
2006-11-07 17:22:51 · answer #2 · answered by phantomlimb7 6 · 1⤊ 0⤋
why do you hairs get up when the room temperature gets lower?
2006-11-07 17:12:06 · answer #3 · answered by Become a better person 3 · 1⤊ 0⤋
Good question!
It is a reflex, like getting goosebumps
2006-11-07 17:15:10 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It is a reflex like shivering but the bumps are bigger.
2006-11-07 17:18:17 · answer #5 · answered by Rich Z 7 · 0⤊ 0⤋
your body says so..
2006-11-07 17:15:34 · answer #6 · answered by Anonymous · 0⤊ 0⤋