Which of the following physiologic changes occur during sleep?
Colonic motility is decreasedPenile tumescence occurs during REMPlasma growth hormones peak during Stage N3The heart rate can increase by up to 35% during REMCerebral blood flow decreases during non-REM sleep
A. II, III, and V only
B. I, III, V only
C. I, II, III, IV, and V
D. I, II, III only
Answer: C
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