Melatonin is a hormone:
A) that fluctuates on about a 90-minute cycle.
B) that is secreted largely during hours of darkness.
C) that is secreted largely during hours of daylight.
D) produced by the pituitary gland that triggers sleep.
Correct Answer:
Verified
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A)a fluctuation in
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A) the synchronization of
Q27: Melatonin helps to:
A) regulate our biological rhythms
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