Circadian rhythms in biology and their crucial role in regulating sleep patterns through the hormone melatonin.
Circadian Rhythm: The circadian rhythm is the physiological sleep-wake cycle that follows a 24-hour cycle influenced by exposure to sunlight and daily activities. It involves changes in body temperature, blood pressure, and blood sugar levels. One important regulator of sleep-wake cycles is the hormone melatonin, released by the pineal gland in response to light and darkness.
Sleep Relation: Circadian rhythms play a crucial role in regulating the sleep-wake cycle. Most people sleep at night and are awake during the day due to the alignment of their circadian rhythm with the outside world. The internal clock, driven by brain cells, guides this cycle, ensuring proper rest and wakefulness at specific times.
Melatonin: The hormone melatonin is a key player in regulating sleep patterns influenced by circadian rhythms. It is released in response to darkness and helps signal the body for rest, contributing to the maintenance of a healthy sleep-wake cycle.
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