Hormonal Control of Digestion Chap 12 p 220. What are hormones?

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Presentation transcript:

Hormonal Control of Digestion Chap 12 p 220

What are hormones?

Hormones: A substance made by one set of cells that affects a different, specific set of cells Endocrine Function: transported to target in blood

Hormones in Digestion HormoneStimulated By: Made By:Site of Action Description of Action 1. GastrinHigh protein meal By lower stomach Upper Stomach Increases production of Gastric Juice

Hormones Digestion HormoneStimulated By: Made By:Site of Action Descriptio n of Action 2. Gastrin Inhibitory Peptide (GIP) Increased activity of gastral glands Duodenum (first part of small intestine) Upper Stomach INHIBITS production of gastric juice

Hormones in Digestion HormoneStimulated By: Made By:Site of Action Description of Action 3. SecretinAcid in chyme DuodenumPancreas Gallbladder Stimulates release of pancreatic juices & of bile

Hormones Digestion HormoneStimulated By: Made By:Site of Action Description of Action 4. CCK (CholeCystoKinin) Partially digested protein & fat DuodenumPancreas Gallbladder Stimulates pancreatic juices Stimulates release of bile

The Small Intestine Pg

Small Intestine Chemical Digestion  in Duodenum (first 25cm) Absorption  Villi