Melatonin is secreted by the
A) superior colliculi.
B) SCN.
C) the pituitary gland.
D) the pineal gland.

Question

Quizplus · Accepted Answer

Melatonin is primarily secreted by the pineal gland, which is located in the brain. The other options, such as the superior colliculi and the pituitary gland, are not directly involved in melatonin secretion. The SCN (Suprachiasmatic nucleus) is located in the hypothalamus and plays a key role in regulating the circadian rhythm, which affects melatonin secretion, but it is not the direct source of melatonin secretion.

Melatonin Is Secreted by the