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The consumption of alcohol affects sleep because it..
  • A
    constricts the peripheral blood vessels.
  • B
    causes constipation during sleep.
  • C
    lowers the body temperature when sleeping.
  • D
    affects one’s sleep patterns.


Alcohol is widely used by aircrew as an aid to sleep. It is however a non-selective central nervous depressant. It may induce sleep but the sleep pattern will not be normal as REM sleep will be reduced considerably and early waking is likely.

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