The pea-sized gland that is stimulated by light and helps regulate activity levels over the course of a day is the __________ gland.
A) adrenal
B) pituitary
C) pineal
D) thyroid

Question

Quizplus · Accepted Answer

The pineal gland is located in the brain and is responsible for producing melatonin, a hormone that helps regulate sleep-wake cycles in response to the amount of light in the environment. The other glands listed (adrenal, pituitary, and thyroid) are all important in regulating various bodily functions, but they do not play a direct role in regulating circadian rhythms.

The Pea-Sized Gland That Is Stimulated by Light and Helps