The secretion of melatonin is ultimately regulated by a group of neurons in the ___.
A) amygdala
B) hypothalamus
C) hippocampus
D) thalamus

Question

Quizplus · Accepted Answer

The hypothalamus plays a key role in regulating the secretion of melatonin, a hormone that is involved in regulating sleep-wake cycles. Specifically, the hypothalamus contains a small group of neurons known as the suprachiasmatic nucleus (SCN), which is responsible for regulating the body's circadian rhythms. The SCN receives input from the eyes, which helps it to synchronize the body's internal clock with the external environment. When it gets dark, the SCN signals the pineal gland to secrete melatonin, which helps to promote sleep.

The Secretion of Melatonin Is Ultimately Regulated by a Group