Visit this link (http://openstaxcollege.org/l/melatonin) to view an animation describing
Chapter 17, Problem 4(choose chapter or problem)
Visit this link (http://openstaxcollege.org/l/melatonin) to view an animation describing the function of the hormone melatonin. What should you avoid doing in the middle of your sleep cycle that would lower melatonin?
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