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    Invitation to Psychology
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    Exam 5: Body Rhythms and Mental States
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    Melatonin Is
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Melatonin Is

Question 193

Question 193

Multiple Choice

Melatonin is


A) a hormone that fluctuates on about a 90-minute cycle.
B) a hormone that is secreted largely during hours of darkness.
C) a hormone that is secreted largely during hours of daylight.
D) a hormone that increases alertness and wakefulness.

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