notes-9-digestion-and-absorption

notes-9-digestion-and-absorption - • Pancreatic lipase...

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1 Digestion & Absorption GI Tract - Overview Mouth Esophagus Stomach Duodenum Jejunum Ileum Cecum Ascending colon Transverse colon Descending colon Sigmoid colon Small intestine Large intestine Why do we eat what we eat? Appetite •__________ desire •Food environment, eating environment Hunger •__________ need •Hypothalamus Satiety •Feeling of __________
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2 Digestion __________ •Pre-digestion •Cut, chop, soak, heat •Easier to chew, swallow, digest __________ •Pre-release of digestive enzymes •Cooking, thinking about food Mouth __________ •Mechanical digestion __________ •Mucus •Enzymes •Lysozymes Tongue •__________ Stomach Capacity 4-6 cups Stretch receptors Holds food for 2-4 hours •__________ __________
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3 Stomach __________ cells •HCl __________ cells •Pepsin __________ cells •Mucus Chyme Cardiac sphincter Pyloric sphincter Small Intestine Mechanical digestion __________ Chemical digestion •_____ Pancreatic amylase
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Unformatted text preview: •_____ Pancreatic lipase Bile •_____ Trypsin Large Intestine Fiber, waste __________ Absorption of __________ Feces 4 Accessory Organs __________ •Digestive enzymes •Sodium bicarbonate __________ •Receives nutrients •Produces bile __________ •Stores bile •Releases bile Hormones __________ •Food in stomach, thoughts HCl, pepsin __________ •HCl in S.I. sodium bicarbonate __________ •Fat/protein in S.I. bile, enzymes, satiety __________ •CHO in S.I. satiety Content Review Appetite vs. hunger What is the hypothalmus? What and where are sphincters? Where and how are CHO, fat,and protein digested? What makes the small intestine so effective for absorbing nutrients? What are the roles of the pancreas, liver, and gall bladder? What are the primary digestive hormones?...
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This note was uploaded on 09/28/2010 for the course IPHY 3420 at Colorado.

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notes-9-digestion-and-absorption - • Pancreatic lipase...

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