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kolbaska11 [484]
3 years ago
7

Describe the human sleep cycle, including the four stages and REM sleep, and what happens in each

Health
2 answers:
jarptica [38.1K]3 years ago
7 0

Answer:

Explanation:

Sleep begins in stage 1 and progresses into stages 2, and 3. After stage 3 sleep, stage 2 sleep is repeated before entering REM sleep. On average, we enter the REM stage approximately 90 minutes after falling asleep. The first cycle of REM sleep might last only a short amount of time, but each cycle becomes longer.

s2008m [1.1K]3 years ago
3 0
Stage 1 is the beginning of the sleep cycle and is a relatively light stage of sleep. Stage 1 can be considered a transition period between wakefulness and sleep. Stage 2 is the second stage of sleep and lasts for approximately 20 minutes. During stage 2 sleep, You become less aware of your surroundings.Body temperature drops. Breathing and heart rate become more regular. During stage 3 sleep: Muscles relax. Blood pressure and breathing rate drop. Deepest sleep occurs. During REM sleep: The brain becomes more active.
The body becomes relaxed and immobilized. Dreams occur. Eyes move rapidly.
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