It is a hormone that regulates our diurnal rhythms.
Correct answer: C. Melatonin
- A. FSH
- B. MSH
- C. Melatonin
- D. Prolactin
Explanation
Melatonin is a hormone secreted by the pineal gland that helps regulate our diurnal (daily) rhythms, including sleep-wake cycles.
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About Chemical Coordination and Hormones
Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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