Multiple Choice
Acetylcholine (ACh) levels in the brain are high during _______________ sleep but lower during ______________ sleep.
A) REM; wakefulness and NREM
B) NREM; wakefulness and REM
C) wakefulness and REM; NREM
D) wakefulness and NREM; REM
Correct Answer:

Verified
Correct Answer:
Verified
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