Robert has had difficulty sleeping for the past 6 months, and his body seemingly no longer differentiates between night and day. His doctor believes the problem lies with Robert's endocrine system. What gland will Robert's physician focus on?
A) pineal
B) pituitary
C) adrenal
D) thyroid

Question

Quizplus · Accepted Answer

The pineal gland produces melatonin, a hormone involved in the regulation of sleep-wake cycles. Dysfunction of the pineal gland can result in circadian rhythm disorders such as insomnia.

Robert Has Had Difficulty Sleeping for the Past 6 Months