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47-nutr&digoutl - E absorption of food molecules...

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Biol 3 Lecture: Processing Food & Nutrition (SBM9: Ch 47) © 2011 copyright Marta D. de Jesus I. all animals are II. Terms for feeding modes A. food source 1. herbivore ruminants 2. carnivore 3. omnivore 4. detritivores saprobe B. method of feeding 1. suspension-feeders 2. substrate/deposit-feeders 3. fluid-feeders 4. bulk-feeders III. Overall process ----------------> ------------------> ------------> IV. Development of digestive tracts A. intracellular digestion B. extracellular digestion gastrovascular cavities tubular/complete tracts a. mouth b. pharynx c. esophagus d. stomach
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e. gizzard f. midgut typhlosole g. hindgut h. rectum i. anus V. Human Digestive System A. ingestion & physical breakdown of food: mouth & teeth 1. teeth a. incisors b. canines/cuspids c. premolars/bicuspids d. molars 2. saliva amylase 3. tongue B. transport 1. pharynx swallowing reflex. trachea epiglottis 2. esophagus bolus peristalsis C. stomach sphincters
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secretions a. by parietal cells b. by chief cells c. by mucus cells acid chyme . D. digestion of food molecules duodenum
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Unformatted text preview: E. absorption of food molecules jejunum & ileum a. b. villi. c. microvilli brush border 2. Food monomers 3. From these cells a. blood stream b. lacteal 4. other organs a. pancreas b. gall bladder c. liver 5. control of digestion b. hormonal control 1) gastrin 2) secretin 3) cholecystokinin (CCK) 4) enterogastrone/glucose-dependent insulinotropic or gastric inhibitory peptide (GIP) F. water reabsorption & elimination cecum appendix 2. has several sections 3. rectum anus defecation reflex some problems a. diarrhea b. constipation c. colon cancer VI. Human Nutrition A. balanced diet. 1. major components 2. “minor” components 3. How do we measure amounts of food? 4. some appetite-regulating hormones a. insulin b. leptin c. PYY d. ghrelin B. Carbohydrates 1. digestible 2. indigestible = fiber= roughage C. Proteins 8 essential amino acids D. Lipids 2 essential fatty acids E. “Micro”nutrients RDA vitamins minerals phytochemicals...
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