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duonghathuylinh duonghathuylinh
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6 years ago
Explain why it is said that the brain is active during sleep.
 
  What will be an ideal response?
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6 years ago
Answer: Circuits in the brain control the sequencing of the various phases of sleep, with the cycle lasting about 90 minutes. Blood flow can increase dramatically to deliver oxygen and glucose to brain cells that are active during REM sleep (e.g., the visual association cortex) and there is evidence of mental activity during sleep (e.g., dreaming).
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