Most people experience regular daily physiological changes (e.g. ,body temperature,hormone levels).This is called the person's

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Circadian rhythm refers to the daily physiological changes that occur in a person's body, including body temperature, hormone levels, and sleep-wake cycles. This rhythm is regulated by the body's internal biological clock, which is influenced by external cues such as sunlight and social cues such as work and school schedules. Fixed rhythm, rotating rhythm, and diurnal cycle do not accurately describe this regular daily physiological pattern.

Most People Experience Regular Daily Physiological Changes (E