At what sleep stage does your breathing become more regular and your awareness of external stimulation decrease?
A) REM
B) stage 1
C) stage 2
D) stage 3/4

Question

Quizplus · Accepted Answer

Stage 2 is characterized by a decrease in awareness of external stimulation and a slower heart rate and breathing rate, indicating more regular breathing. REM sleep is characterized by rapid eye movements, muscle atonia, and vivid dreaming. Stage 1 is a transitional stage between wakefulness and sleep, and stage 3/4 is deep sleep characterized by slow delta waves.

At What Sleep Stage Does Your Breathing Become More Regular