Gastrointestinal Motility: Movements that mix and circulate the gastrointestinal contents and prope thern along the length of the tract Secretion: Process by which the glands associated with the gastrointestinal tract release water and substance into the tract chemically degraded to produce smaller molecules that C Digestion: Process by which food and large molecules ar can be absorbed across the wall of the gastrointestinal tract Absorption: Process by which nutrient molecules are absorbed by cell that line the gastrointestinal tract and enter the bloodstream 11
11 Gastrointestinal Motility: Movements that mix and circulate the gastrointestinal contents and propel them along the length of the tract Secretion: Process by which the glands associated with the gastrointestinal tract release water and substance into the tract Digestion: Process by which food and large molecules are chemically degraded to produce smaller molecules that can be absorbed across the wall of the gastrointestinal tract. Absorption: Process by which nutrient molecules are absorbed by cell that line the gastrointestinal tract and enter the bloodstream
I REGULATION OF GASTROINTESTENAL TRACT FUNCTIONS 12
12 I REGULATION OF GASTROINTESTINAL TRACT FUNCTIONS
Endocrine Cell and gut hormo Cell Hormone Gastrin(G) autumn/duodenum Cholecystokinin(CCK) duodenum、 jejunum Secretin duodenum、 jejunum D Somatostatin(SS) Stamoch, duodenum, pancreas, colon Enteroglucagon Small intestine. colon PP Pancreatic polypeptide(PP) pa ECI Substance P(SP) Stamoch, intestine DI VIP Stamoch, intestine, pancreas bombesin Antrum. duodenum PNBAK neurotensin ileum insulin pancreas glucagon pancreas Gastric inhibitory duodenum、 jejunum Mo polypeptide GiP motllin Stamoch. intestine 13
13 Cell Hormone Site G Gastrin (G) autrumn, duodenum I Cholecystokinin (CCK) duodenum、jejunum S Secretin duodenum、jejunum D Somatostatin (SS) Stamoch, duodenum, pancreas, colon L Enteroglucagon Small intestine, colon PP Pancreatic polrpeptide (PP) pancreas EC1 Substance P (SP) Stamoch, intestine D1 VIP Stamoch, intestine, pancreas P bombesin Antrum, duodenum N neurotensin ileum B insulin pancreas A glucagon pancreas K Gastric inhibitory polypeptide(GIP) duodenum、jejunum Mo motilin Stamoch, intestine Endocrine Cell and gut hormone