What 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

Question

Quizplus · Accepted Answer

The most important stimulus for contraction of the gallbladder is cholecystokinin (CCK), which is secreted by the duodenal mucosa in response to the presence of fatty acids and amino acids in the small intestine. CCK stimulates contraction of the gallbladder and relaxation of the sphincter of Oddi, allowing bile from the gallbladder to flow into the duodenum. Mechanical contraction of the small intestine, sympathetic stimulation, or an increase in bile secretion by the liver may also affect gallbladder contraction, but they are not the primary stimuli.

What Is the Most Important Stimulus for Contraction of the Gallbladder