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Bio_1A_Lecture_15_Digestion

Bio_1A_Lecture_15_Digestion - A lim e n t a t io n D ig e s...

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Food acquisition - behavioral adaptations Food ingestion - behavioral & morphological adaptations Food processing - motility & enzymatic digestion Food absorption - mechanisms to take molecules into cells Alimentation (Digestion & Nutrition)
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Extra-cellular Digestion Food ingestion - behavioral & morphological adaptations Lion
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Food ingestion - behavioral & morphological adaptations
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The Human Gastrointestinal (GI) Tract
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The Swallowing Reflex Peristalsis: Peristaltic waves of contraction
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pepsinogen pepsin HCl (active enzyme) STOMACH: secretory organ; stores, mixes & macerates food different cells secrete different products 2. HCl: strong acid; kills bacteria; denatures protein, activates pepsin 3. Pepsin: digestive enzyme that hydrolyzes protein (mucous cells secrete mucus) Parietal cells (secrete HCl) Chief cells (secrete proenzyme: pepsinogen) Gastric gland) Surface of stomach 1. Mucus: lubrication
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Liver Gall Bladder Duodenum of small intestine Pancreas Stomach Esophagus bile bile Intestinal juice HCO 3 & zymogens Acid & Pepsinogen pyloric sphincter Anatomical relationships among central GI organs
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