Question

40 minutes remaining15 of 50 questions remainingtest contentpage 35 of 50question 352 pointsmelatonin release from the pineal gland is stimulated by ____ and inhibited by ____.darkness; lighttwilight; gloompulsing light; steady lightlight; darknessclear selection

Explanation:

Melatonin is a hormone regulated by light exposure. The pineal gland increases melatonin secretion in dark conditions to support sleep, while light exposure (especially bright light) suppresses its release by signaling the body that it is daytime.

Answer:

darkness; light