What is the primary role of cholecystokinin (CCK) in appetite regulation?

Cholecystokinin (CCK) primarily functions as a hormone that plays a significant role in reducing food intake. It is released by the intestinal cells in response to the presence of fats and proteins in the digestive system. When CCK is secreted, it signals the brain to promote feelings of satiety, thus helping to decrease appetite and encourage the cessation of eating. This feedback mechanism is essential for regulating food intake and maintaining energy balance.

Additionally, CCK aids in the digestive process by promoting the release of digestive enzymes from the pancreas and stimulating bile secretion from the gallbladder, which assists in the emulsification and absorption of dietary fats. However, its primary role in appetite regulation focuses on the reduction of food intake, making it a key component in the complex system that controls hunger and satiety.