The difference between hours of sleep needed and actual hours slept is

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Sleep debt refers to the difference between the amount of sleep you need and the amount you actually get. This can build up over time and lead to negative consequences for your physical and mental health. Choice A (sleep ratio) is not a commonly used term in sleep science. Choice C (sleep pattern) refers to the regularity and structure of a person's sleep, and choice D (sleep inertia) refers to the groggy feeling that can occur upon waking up from sleep.

The Difference Between Hours of Sleep Needed and Actual Hours