CCK plays a role in increasing bile secretion by contracting which organ?

Cholecystokinin (CCK) is a hormone produced by the cells in the small intestine in response to the presence of fats and proteins in the chyme. One of its primary roles is to stimulate the gallbladder to contract, which results in the release of bile into the small intestine. Bile is essential for the digestion and absorption of fats. When CCK is secreted, it interacts with receptors on the gallbladder, causing it to contract and expel stored bile.

The process of gallbladder contraction is an important part of the digestive process, specifically facilitating the emulsification of fats, which enhances the action of digestive enzymes. By increasing bile secretion, CCK plays a critical role in promoting effective digestion of dietary fats, making the gallbladder the correct answer.