_____ manufacture(s) melatonin.

Question

Quizplus · Accepted Answer

Melatonin is primarily produced by the pineal gland, a small gland in the brain that regulates melatonin levels in response to light and dark cues. The suprachiasmatic nucleus (A) helps regulate the body's 24-hour circadian rhythm, but does not directly produce melatonin. The optic nerves (C) transmit visual information from the eyes to the brain and do not play a direct role in melatonin production. The use of stimulant drugs (D), such as caffeine and nicotine, can interfere with melatonin production and disrupt circadian rhythms.

_____ Manufacture(s) Melatonin