Which of the following is the most important stimulus for contraction of the gallbladder?
A) CCK
B) mechanical contraction of the small intestine
C) sympathetic stimulation
D) an increase in bile secretion by the liver
E) bile salts

Question

Quizplus · Accepted Answer

CCK, or cholecystokinin, is the primary hormone responsible for stimulating the contraction of the gallbladder. When fat enters the small intestine, it stimulates the secretion of CCK, which in turn causes the gallbladder to contract and release bile into the small intestine to aid in digestion. While the other options can also play a role in bile production and release, they are not as direct or significant in stimulating contraction of the gallbladder.

Which of the Following Is the Most Important Stimulus for Contraction