DHA Beauty Therapy/Aesthetician Practice Exam

Question: 1 / 400

Which gland secretes melatonin, a hormone that regulates sleep-wake cycles?

Adrenal gland

Pituitary gland

Thyroid gland

Pineal gland

Melatonin is a hormone that plays a crucial role in regulating sleep-wake cycles and is primarily secreted by the pineal gland. This small, pea-shaped gland located in the brain is responsible for producing melatonin in response to darkness, signaling to the body that it is time to prepare for sleep. The release of melatonin helps to promote sleep by lowering body temperature and inhibiting wakefulness.

The pineal gland's function in melatonin secretion is vital for maintaining circadian rhythms, which are physical, mental, and behavioral changes that follow a daily cycle. Disruptions in melatonin production can lead to sleep disorders and affect overall health. Therefore, the pineal gland is key in regulating our biological clock and ensuring that sleep patterns are synchronized with the natural light-dark cycle.

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