🔬 MCAT Exam Prep

Which sleep stage is characterized by rapid eye movements and vivid dreaming?

A Stage 1 NREM
B Stage 2 NREM
C Stage 3 NREM
D REM sleep

✓ Correct Answer: Option D

REM sleep features rapid eye movements, muscle atonia, and vivid, narrative dreaming. It is also called paradoxical sleep.

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