They dilate in response to stimulation by the sympathetic nervous system.
yea its sypathetic stim. and adrenaline !
Have an opinion?
My teacher told me that once, I believe that it is all bullsh*t
ur teacher meant a human's pupil dilates,nt a monkey's...:P
They also dilate in response to darkness, alcohol, and many types of drugs. So perhaps you were just drunken, stoned, and in a room with inadequate lights :p
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