Which hormone appears to play an important role in establishing the body's sleep-wake cycle?
A) thymosin
B) cortisol
C) melatonin
D) aldosterone

Question

Quizplus · Accepted Answer

Melatonin is a hormone released by the pineal gland, and its levels typically rise at night to promote sleep and fall during the day to promote wakefulness. Melatonin is thought to play an essential role in establishing the body's sleep-wake cycle or circadian rhythm.

Which Hormone Appears to Play an Important Role in Establishing