Voluntary muscle activity

Reference no: EM13502634

1. In the United States, melatonin is classified as

A. a steroid
B. a narcotic
C. a form of caffeine
D. a dietary supplement

2. Voluntary muscle activity

A. is at its lowest during REM sleep
B. is at its highest during REM sleep
C. does not occur in NREM sleep
D. does not occur during either REM or NREM sleep

Reference no: EM13502634

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