Examlex
Signs are consequences or indicators of something specific, which human beings can change by their arbitrary actions or labels.
Pineal Gland
The pineal gland is a small endocrine gland in the brain that produces melatonin, a hormone that regulates sleep-wake cycles.
Melatonin
Melatonin is a hormone produced by the pineal gland that regulates sleep-wake cycles and is often used as a supplement to treat sleep disorders.
Hypothalamus
A small region of the brain that plays a crucial role in many important functions, including releasing hormones, regulating body temperature, and controlling hunger and thirst.
Sleep-Wake Cycle
The natural, cyclic pattern of sleep and wakefulness, regulated by the body's internal clock and influenced by environmental cues like light and darkness.
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