anonymous
  • anonymous
Our biological clocks make us feel most sleepy from?
Fundamentals of Clinical Trials
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Our internal circadian biological clocks regulate the timing of periods of sleepiness and wakefulness throughout the day. The circadian rhythm dips and rises at different times of the day, so adults' strongest sleep drive generally occurs between 2:00-4:00 am and in the afternoon between 1:00-3:00 pm.

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