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oaqadir oaqadir
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11 years ago
What effect does the sympathetic nervous system stimulation have on pupil diameter?
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wrote...
11 years ago
like if you shined a light in your eye,.. the sympathetic nerve would make the pupil smaller

it's a reflex

http://en.wikipedia.org/wiki/Pupillary_light_reflex
wrote...
11 years ago
The sympathetic nervous system functions in times of stress (fight or flight).  This causes  pupil  dilation which is a survival response.
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