________ occurs when there is a chronic deficiency in sleep. Select one: a. circadian rhythm b. jet lag c. sleep debt d. rotating shift work

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Sleep Physiology

Sleep is a condition of reduced muscle movement in the body. Awareness about the surroundings is reduced at the time of sleep. The body stays mildly responsive or non-responsive to external stimuli. The sleep-wake cycle is controlled by the circadian rhythm that produces a resting phase for the body.