Narcolepsy May Be Caused by

question 150

Multiple Choice

Narcolepsy may be caused by

• A) excessive alcohol use.
• B) brain abnormalities in the medulla that interfere with breathing during sleep.
• C) a circadian rhythm that is out of synchrony with the outside world.
• D) a lack of production or sensitivity to the chemical hypocretin, or orexin.

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