The toxin of Vibrio cholerae causes profuse diarrhea because it
a. modifies a G protein involved in regulating salt and water secretion
b. decreases the cytosolic concentration of calcium ions, making the cells hypotonic to intestinal cells
c. binds with cyclase
d. signals triphosphatase to become a 2nd messenger for the release of calcium
e. modifies calmodulin and activates a cascade of protein kinases
Answer: A