Multiple Choice
This image depicts the sleep cycles over the course of a typical night. In which stage does the brain become much more active, and heart rate, blood pressure, and respirations shift up and down, sometimes extremely?
A) stage 1 NREM
B) stage 2 NREM
C) REM sleep
D) stage 4 NREM
Correct Answer:
Verified
Correct Answer:
Verified
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