LaneyMM8038 LaneyMM8038

03-11-2017
Biology

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Early sleep research began when researchers noted that physiological changes create _______ that can be measured during sleep.

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meerkat18 meerkat18

14-11-2017

hormones -- such as melatonin and cortisol; the former signals the body to go to bed, while the latter signals for the sleeping person to wake up -- are created by physiological changes.

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