Erin finds it terribly difficult establishing a regular sleep-wake cycle.Lately,she has been suffering from insomnia.In diagnosing the problem,a medical doctor might want to check the functioning of which gland(s)?
A)the thyroid gland
B)the pancreas
C)the adrenal glands
D)the pineal gland

Question

Quizplus · Accepted Answer

The pineal gland is responsible for regulating the sleep-wake cycle through the production of the hormone melatonin. Checking the functioning of the other glands listed would not necessarily relate to insomnia or the sleep-wake cycle.

Erin Finds It Terribly Difficult Establishing a Regular Sleep-Wake Cycle