What bodily functions are regulated by the approximately 24-hour circadian rhythm?

Answer

Hormone release, body temperature, and the drive to sleep and wake

The circadian rhythm functions as the body's internal master clock operating on roughly a 24-hour cycle. This intricate timing mechanism governs numerous critical physiological processes throughout the day and night. Specifically, it directs the timing of hormone release, which includes the peaks and valleys of sleep-promoting hormones like melatonin. Furthermore, it controls baseline body temperature fluctuations and is responsible for generating the internal drive signals that prompt an individual to feel sleepy at night and awake in the morning. Optimal sleep efficiency and restorativeness are achieved when sleep timing aligns harmoniously with this underlying internal rhythm.

What bodily functions are regulated by the approximately 24-hour circadian rhythm?

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