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Question: 1 / 530

What best defines the circadian rhythm?

An innate daily physiological pattern

The circadian rhythm is a 24-hour, internal biological process that regulates various physiological and behavioral processes. This rhythm is innate, meaning it is naturally present in the body and does not need to be learned or acquired. Option B, a sleep disorder, is incorrect because while disruptions to circadian rhythm can lead to sleep disorders, it is not a sleep disorder in itself. Option C, a type of biological rhythm, is partially correct but not specific enough to best define the circadian rhythm. Option D, the cycle of the moon, is incorrect as the circadian rhythm is not based on the moon's cycle, but rather on light and dark cycles in a 24-hour period. Thus, option A is the most accurate and comprehensive definition of the circadian rhythm.

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A sleep disorder

A type of biological rhythm

The cycle of the moon

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