What causes contraction of the gallbladder?

Question

Quizplus · Accepted Answer

Contraction of the gallbladder is primarily caused by the hormone cholecystokinin (CCK), which is released by the duodenum in response to the presence of food, particularly fatty foods. CCK signals the gallbladder to release bile, which aids in the digestion and absorption of fats in the small intestine. Gastrin and secretin are hormones involved in the regulation of gastric acid secretion and pancreatic enzyme secretion, respectively, but they do not directly cause contraction of the gallbladder. The presence of fat in the stomach may stimulate CCK release, but it is not a direct cause of gallbladder contraction.

What Causes Contraction of the Gallbladder