The Terms "Light Sleep" and "Deep Sleep" Are Not Very

question 142

Multiple Choice

The terms "light sleep" and "deep sleep" are not very useful because

• A) dreams occur during both REM and non-REM sleep.
• B) brain activity increases in stages 1 and 3, and decreases in stages 2 and 4.
• C) all stages of sleep are equally "deep."
• D) paradoxical sleep is deep in some ways and light in others.

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