Detailed explanation and options for the selected question.
Which hormone, secreted by the pineal gland, regulates the sleep-wake cycle?
A.
Cortisol
B.
Melatonin
C.
Aldosterone
D.
Adrenaline
Explanation:
Melatonin from the pineal gland helps regulate circadian rhythms. Cortisol is stress hormone, aldosterone for salt balance, adrenaline fight-or-flight.