Most animals placed under unnatural constant illumination have more difficulty sleeping thanks to decreased production of
A) leptin.
B) cortisol.
C) melatonin.
D) free radicals.

Question

Quizplus · Accepted Answer

Melatonin is a hormone that regulates sleep and is produced at higher levels in the dark. Unnatural constant illumination can disrupt the production of melatonin, leading to difficulty sleeping in animals. Leptin and cortisol are not directly involved in regulating sleep, and free radicals are not a hormone.

Most Animals Placed Under Unnatural Constant Illumination Have More Difficulty