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REM sleep, one of the distinct stages of the human sleep cycle, is most closely associated with which activity?

AComplete muscle paralysis with no brain activity at all
BVivid dreaming
CThe very first few minutes of falling asleep only
DThe deepest, most difficult stage of sleep to wake from

Explanation

REM sleep, short for rapid eye movement sleep, is a distinct stage of the sleep cycle most closely associated with vivid dreaming, during which brain activity closely resembles that of being awake even though the body remains asleep, and the eyes move rapidly beneath closed eyelids. During REM sleep, most of the body’s voluntary muscles become temporarily paralyzed, which may serve to prevent a sleeping person from physically acting out their dreams. A typical night’s sleep involves cycling through several different sleep stages, including multiple periods of REM sleep, interspersed with deeper, non-REM stages. Explore more Everyday Science MCQs on mcqstutor to keep practicing.

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