The answer is true. Melatonin is a hormone that is created by the pineal
gland in animals and controls sleep and alertness. It seems
to have 2 possible interacting effects on the sleep-wake cycle. First, it encourages
sleep and stability in a “hypnotic” function by escalating the homeostatic coerce
to sleep. Second, it entrains and modifies the process c in a “chronobiotic”
function.
