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What are the two stages of sleep

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Answer:

There are two basic types of sleep: rapid eye movement (REM) sleep and non-REM sleep (which has three different stages). Each is linked to specific brain waves and neuronal activity.

Step-by-step explanation:

User JonathanN
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Answer:

There are two basic types of sleep: rapid eye movement (REM) sleep and non-REM sleep

Step-by-step explanation:

User Paul Coshott
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