Multiple Choice
The proteins PER and TIM,originally discovered in insect but now found in mammals also,influence circadian rhythms by ____.
A) building up during the day and declining during sleep
B) being transformed into melatonin
C) stimulating and inhibiting (respectively) the release of acetylcholine in the cerebral cortex
D) providing negative feedback from the muscles to the neurons that innervate them
Correct Answer:

Verified
Correct Answer:
Verified
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