A night-shift worker experiences extreme difficulty falling asleep due to being exposed to bright lights during both night and day. The unusual pattern of light exposure is disturbing their ________, which controls the release of the hormone ________.
A)metabolic rate; thyroxine
B)circulatory system; dopamine
C)circadian rhythm; melatonin
D)limbic system; thymosin

Question

Quizplus · Accepted Answer

The circadian rhythm is the body's internal clock responsible for regulating sleep-wake cycles. Melatonin is the hormone that is released by the pineal gland in response to darkness and helps to promote sleep. Exposure to bright lights during the night and day can disrupt the circadian rhythm and suppress the release of melatonin, making it difficult to fall asleep.

A Night-Shift Worker Experiences Extreme Difficulty Falling Asleep Due to Being