1.

Toxins that increase the cyclic AMP content of the intestinal mucosa cause diarrhoea because they:

A. increase Cl- secretion into the intestinal lumen
B. increase Na+ absorption in the small intestine
C. increase K+ secretion into the colon
D. increase Na+/K+ co-transport K+ secretion into the colon
E. none of the above
Answer» B. increase Na+ absorption in the small intestine


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