Dec '10
MCAT Question of the Day | MCAT Course

  • Q:

    Symptoms of infection with bacterium X include diarrhea. Bacterium X is intracellular and is known to secrete a toxin which inhibits the transfer of sodium ions from the gut into the bloodstream. Why would the inhibition of sodium transfer cause diarrhea?



    Sodium is toxic to the gut and causes diarrhea.


    The inability to remove sodium (and therefore salt) from the gut causes water to move into the gut and out of the body as diarrhea.


    Sodium transfer across the epithelium generates ATP which is necessary for the removal of water from the gut and prevention of diarrhea.


    The removal of sodium (and therefore salt) from the gut causes the inability to absorb vitamins. This poor nutrition results in diarrhea.

    Tags: Digestive System | Suggest a tag


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