Which of the following are correctly paired to their appropriate stage of sleep?

A. Stage 1: theta waves and K complexes

B. Stage 2: muscle twitches and sleep spindles

C. Stages 3 and 4: delta waves and release of growth hormone

D. REM sleep: delta waves and night terrors

Click to reveal answer

Answer C is correct

Throughout a night of sleep, a person progresses through successive sleep stages,

which occur in a loop to form sleep cycles. Stage 3 and 4 are characterized by the

presence of delta waves on an electroencephalogram (EEG) study of the brain’s

electrical function. During these stages, night terrors can occur, as well as the

release of growth hormone, making answer C correct

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Day 134 MCAT Practice Question