Humans placed under unnatural constant illumination have more difficulty sleeping thanks to decreased production of

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Quizplus · Accepted Answer

Melatonin is the hormone that helps regulate the sleep-wake cycle. Exposure to constant artificial light can disrupt the body's natural production of melatonin, leading to difficulty sleeping. Leptin and cortisol are hormones involved in regulating appetite and stress, respectively, and are not directly related to sleep. Free radicals are unstable molecules that can damage cells, but they are not hormones and are not directly related to sleep.

Humans Placed Under Unnatural Constant Illumination Have More Difficulty Sleeping