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Home Q & A Board Science-Related Homework Help Psychology
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SpiderX SpiderX
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9 years ago
During the night, which two types of sleep alternate with each other in cycles that take approximately 90 minutes?
a.   alpha sleep and delta sleep
b.   Stage 1 and Stage 2 sleep
c.   REM and NREM sleep
d.   relaxed sleep and alert sleep
Textbook 
Psychology with DSM-5

Psychology with DSM-5


Edition: 11th
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NellyNelly
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9 years ago
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SpiderX Author
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#2
9 years ago
Love psychology, thanks for the lead. Your answer came out right Smiling Face with Open Mouth
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#3
9 years ago
Great news! Thumbs up are welcome Wink Face
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