Gastrin, secretin and cholecystokinin.
The term mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes. In chemical digestion, enzymes break down food into the small molecules the body can use. 1 Cholecystokinin (CCK) - is in the duodenum and stimulates the release of digestive enzymes in the pancreas and stimulates the emptying of bile in the gall bladder. 2  This hormone is secreted in response to fat in chyme. 1 Secrete enzymes for digestion – chemical digestion. 2  Stimulate muscle contraction/relaxation – open/close sphincters and move food through the gut. 3  Increase blood flow to the gut – absorption of nutrients. 4  Regulate the flow of water and electrolytes – between the gut and bloodstream. The enzymes are a part of chemical digestion by acting as a catalyst to breakdown food within the gut. Since most digestion hormones play multiple roles, any deficiency or excess can have a profound impact on the digestive process as described in Digestive Problems. Secretion of Bile and the Role of Bile Acids In Digestion. Bile is a complex fluid containing water, electrolytes and a battery of organic molecules including bile acids, cholesterol, phospholipids and bilirubin that flows through the biliary tract into the small intestine.  Enzymes & Hormones Involved in Carbohydrate Digestion. Carbohydrate digestion is complex, involving a system of enzymes and hormones. Digestion of carbohydrates is a complex process, beginning in the mouth and proceeding through the stomach and then into the small and large intestines. Along this digestive path, a variety of enzymes and hormones are secreted, each designed for a specific task. 1 Cholecystokinin: A small intestinal hormone that stimulates secretion of pancreatic enzymes and bile. 2  Secretin: Another hormone secreted from small intestinal epithelial cells; stimulates secretion of a bicarbonate-rich fluids from the pancreas and liver. The second of the two systems that control digestive function is the endocrine system, which regulates function by secreting hormones. Recall that hormones are chemical messengers secreted into blood that modify the physiology of target cells. The digestive hormones should not be confused with digestive enzymes. The hormones coordinate the digestive process by acting as a chemical messenger. The enzymes are a part of chemical digestion by acting as a catalyst to breakdown food within the gut. Since most digestion hormones play multiple roles, any deficiency or excess can have a profound impact on the digestive process as described in Digestive Problems. Simply replacing the digestive enzymes will not compensate for digestive hormone disorders Various parts of the digestive tract secrete many enzymes and fluids. This page is a comprehensive list of those secretions, their source, and their functions. 1  Enzymes speed up digestive processes to make digestion faster. 2  Hormones can stimulate digestion, and the release of hormones into the organs. Duodenum. Fatty acids and peptides. Causes release of digestive enzymes and bile from the pancreas and gallbladder, respectively; slightly decreases gastric secretion; causes contraction of the gallbladder & relaxation of the hepatopancreatic ampullar sphincter; strongly decreases gastric motility; hunger suppressant. Digestion Process. Hormones control the regulation of the entire digestive process -- some even regulate your appetite. The hormones produced in the mucosa cells of the stomach and small intestines work by stimulating these organs and their digestive juices. The three hormones responsible for the digestion of your sandwich are gastrin, secretin and cholecystokinin (CCK). 1  Gastrin gives the stomach the signal to produce acid. 2  Secretin communicates with all the major digestive accessory organs. 3  CCK talks to the little organs: the pancreas and the gallbladder.  Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream. Digestion is a form of catabolism that is often divided into two processes based on how food is broken down: mechanical and chemical digestion. 1 Cholecystokinin (CCK) - is in the duodenum and stimulates the release of digestive enzymes in the pancreas and stimulates the emptying of bile in the gall bladder. 2  This hormone is secreted in response to fat in chyme. Science Main Index. Hormones are chemical messengers that help regulate bodily functions. They are produced by glands in the body. In the digestive system, hormones regulate functions such as enzyme and gastric juice production used in the breakdown of fats, proteins, and carbohydrates. They also control the pace of muscle contractions moving food along the digestive tract. Read on to learn more about hormones, and their role in digestion. 
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what hormones are used in digestion