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Postby kimmie » Wed Jul 26, 2006 10:02 am

i got this question in class today and i have no idea what the answer is

is says " describe the changes in physiology when we blush and when we go pale (faint)"

if anyone knows any biological answer to this question please notify me immediately
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Postby kiekyon » Wed Jul 26, 2006 11:49 am

Blushing is a physical condition caused by over-activity in the so-called sympathetic nervous system, a system made up of nerves over which we have no control. These uncontrollable nerves may become especially active due to social and emotional stimuli and may be very embarrassing.

Turning pale on the other hand is the response of the parasympthetic
nervous system. It responds just oppositely of the sympathetic system.
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Postby MrMistery » Wed Jul 26, 2006 7:27 pm

the direct effect occurs because of widening or tightning of blood vessels beneath the skin
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Postby Navin » Thu Jul 27, 2006 8:09 am

aka ateriole dilation (for blushing) or constriction (for going pale).
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