1) During which sleep stage does the brain exhibit activity similar to when you are awake, and dreams often occur? a) NREM1 b) NREM2 c) NREM3 d) REM 2) What is the name of the sleep stage that is characterized by lighter sleep, where you can be easily woken up? a) NREM1 b) NREM2 c) NREM3 d) REM 3) Which sleep stage is known as deep sleep, and is the stage where it is harder to wake someone up? a) NREM1 b) NREM2 c) NREM3 d) REM 4) What does REM stand for in relation to sleep stages? a) Rapid Eye Movement b) Relaxed Muscle Movement c) Regular Eye Movement d) Restful Eye Movement 5) What is the approximate duration of a complete sleep cycle? a) 30-45 minutes b) 60-75 minutes c) 90-110 minutes d) 120-150 minutes 6) What happens to the length of REM sleep periods as the night progresses? a) They become shorter b) They remain the same c) They become longer d) They alternate between short and long 7) How do we measure sleep stages? a) Electrocardiograms b) Electroencephalogram c) Sphygmomanometer d) Endoscopes

Sleep stages quiz

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