Digestive function

Digestive function encompasses the coordinated enzymatic processes that hydrolyze complex food macromolecules into absorbable units within the gastrointestinal tract. It begins in the mouth with salivary amylase breaking down starches and continues in the stomach via pepsin and gastric lipase on proteins and lipids, respectively. The pancreas secretes key enzymes like pancreatic amylase, lipase, trypsin, chymotrypsin, and nucleases into the small intestine, where brush border enzymes such as maltase, lactase, sucrase, and peptidases complete the digestion of carbohydrates, disaccharides, and peptides. Bile emulsifies fats to aid lipase action, enabling micelle formation for absorption. While not a single therapeutic target, disruptions in digestive function contribute to diseases like pancreatic insufficiency and are indirectly linked to gastrointestinal cancers through molecular pathways involving enzymes and related neoplasms. Therapeutic interventions focus on enzyme replacement rather than targeting a specific receptor or protein.

Other names

Gastrointestinal functiongut digestionalimentary digestion

Exogenous enzyme supplementation to replace deficient endogenous hydrolases for substrate hydrolysis; inhibition of acid secretion to optimize enzyme activity in stomach