Three Phases Gastric Secretion: Gastric secretion occurs in three phases: the cephalic phase triggered by food anticipation, the gastric phase initiated by stomach distension, and the intestinal phase regulated by chyme entering the intestine.
Exocrine and Endocrine Pancreas: The pancreas has both exocrine functions—secreting digestive enzymes into the duodenum—and endocrine functions, producing insulin and glucagon to regulate blood sugar levels.