Cholecystokinin (CCK) is believed to function in all of the following processes except:

E. It is important in the control of the anal sphincter.

DISCUSSION: CCK has a physiologic role in the regulation of gastric emptying, eating behavior, gallbladder contraction, and pancreatic secretion. There is experimental evidence that it may serve as a neurotransmitter in the function of the lower esophageal sphincter. It probably also has a role in augmenting the release of insulin after a meal. It has no known role in the function of the anal sphincter.