AP PSYCHOLOGY

Detailed explanation-1: -CONSENSUS STATEMENT Adults should sleep 7 or more hours per night on a regular basis to promote optimal health.

Detailed explanation-2: -In all likelihood, sleep serves a number of different physiological and psychological purposes including cleaning up brain toxins and consolidating information into memory.

Detailed explanation-3: -There are two basic types of sleep: rapid eye movement (REM) sleep and non-REM sleep (which has three different stages). Each is linked to specific brain waves and neuronal activity.

Detailed explanation-4: -One of the earliest theories of sleep, sometimes called the adaptive or evolutionary theory, suggests that inactivity at night is an adaptation that served a survival function by keeping organisms out of harm’s way at times when they would be particularly vulnerable.