Q:

Which of the following statements about the blood-brain barrier is TRUE? It

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Which of the following statements about the blood-brain barrier is TRUE? It


  1. consists of the meninges which surround the brain
  2. is a protective mechanism which limits entry of alcohol into the brain
  3. is poorly developed in the newborn who are therefore less sensitive to drugs which act on the brain
  4. is unable to prevent entry of lipid-soluble toxins into the brain

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D: The BBB does not prevent lipid-soluble toxins, such as alcohol and nicotine, from entering the brain.

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