Q:

Which of the following substances CANNOT cross the blood-brain barrier?

waelhammad
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2022-10-19
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Which of the following substances CANNOT cross the blood-brain barrier?

  1. metabolic wastes, toxins, K +
  2. O 2 , CO 2 and H 2 O
  3. fats, fatty acids, fat soluble substances
  4. alcohol, nicotine, anaesthetics
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waelhammad
2022-10-19
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A: The BBB protects the brain from these substances. The substances in the other choices can all cross the BBB. 

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