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colleen colleen
wrote...
Valued Member
Posts: 17076
10 years ago
A single cycle of non-REM and REM sleep lasts about
a. 10 minutes.
b. 300 minutes.
c. 90 minutes.
d. 360 minutes.
e. 8 hours.
Read 620 times
1 Reply
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Donated
10 years ago
90 min
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