Multiple Choice
Biological rhythms and the onset of sleep are regulated by ____ produced by the ____.
A) cortisol; pineal gland
B) melatonin; pituitary gland
C) parathyroid hormone; parathyroid gland
D) melatonin; pineal gland
E) cortisol; adrenal gland
Correct Answer:

Verified
Correct Answer:
Verified
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