What is an exocrine effect of cholecystokinin (CCK)?

Cholecystokinin (CCK) plays several important roles in the digestive process, particularly related to the exocrine functions of the pancreas. One of its primary exocrine effects is the stimulation of pancreatic enzyme secretion. When food, especially fats and proteins, enters the small intestine, CCK is released from the intestinal mucosa in response to these stimuli.

The secretion of pancreatic enzymes is vital for digestion. These enzymes, which include lipases, amylases, and proteases, are responsible for breaking down fats, carbohydrates, and proteins into smaller molecules that can be absorbed by the body. Thus, CCK facilitates the digestive process by ensuring that these enzymes are secreted at the right time when food is present in the intestines.

Furthermore, CCK also promotes gallbladder contraction, which allows for the release of bile that is essential for fat digestion. This coordinated action of CCK in both stimulating enzyme secretion and aiding in bile release underscores its critical role in digestive physiology.