Increased blood levels of melatonin reduce activity levels and promote sleep.
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Q42: The body's master biological clock is located
Q43: Over 100 bodily processes operate on circadian
Q44: Many blind people have circadian rhythms that
Q45: Typically, blood levels of melatonin reach their
Q46: The pineal gland, located in the brain,
Q48: In response to bright light, the suprachiasmatic
Q49: Normally, a person's different circadian rhythms operate
Q50: When volunteers are deprived of sunlight and
Q51: When volunteers are deprived of sunlight and
Q52: German psychiatrist Hans Berger's invention of the
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