Short sleep reduces the number of functioning immune cells that help one respond to disease. ...

Short sleep reduces the number of functioning immune cells that help one respond to disease.
 
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No conclusive data exists for the sleep habits of young adults actually attending college.
 
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Given the opportunity, sleep-study subjects will sleep upwards to 12 hours a day for months on end.
 
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The brain's oxygen consumption is significantly lower during REM sleep as compared with wakeful activity.
 
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Drowsiness is considered the initial stage of sleep.
 
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