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GI pathophysiology Review section

GI pathophysiology Review section. Bios E-162b, Dec 5, 2010. Overview of the GI system. http://en.wikipedia.org/wiki/File:Digestive_system_diagram_edit.svg. Transit of foodstuffs through the GI system. http://www.youtube.com/watch?v=Z7xKYNz9AS0. The wall of the GI tract has several layers.

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GI pathophysiology Review section

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  1. GI pathophysiology Review section Bios E-162b, Dec 5, 2010

  2. Overview of the GI system http://en.wikipedia.org/wiki/File:Digestive_system_diagram_edit.svg

  3. Transit of foodstuffs through the GI system http://www.youtube.com/watch?v=Z7xKYNz9AS0

  4. The wall of the GI tract has several layers

  5. Sphincters control the transit from one section of the GI tract to the next www.mydr.com.au

  6. Bile and pancreatic secretions are emptied at the same point in the duodenum www.memorialhermann.org

  7. The enteric nervous system regulates GI activity mikedaisey.com

  8. GI hormones also regulate GI activity 04340.com

  9. Gastroesophageal reflux is due to an insufficient closure of the lower esophageal sphincter www.webmd.com

  10. Hiatus hernias may also cause gastroesophageal reflux myhealth.ucsd.edu

  11. Several factors may cause or aggravate GER • Young age • Obesity • Pregnancy • Postural changes after eating • - Smoking • - Peppermint, coffee, alcohol • - Diseases of connective tissue

  12. GER may lead to Barrett’s esophagus Gastric metaplasia of the esophageal epithelium www.lwjuan.com

  13. Barrett’s esophagus mat lead to esophageal adenocarcinoma upload.wikimedia.org

  14. The stomach mucosa produces acid, mucus and pepsinogen

  15. Several mediators induce acid secretion

  16. Peptic ulcers come from an imbalance between acid vs. mucus + HCO3 www.yourgicenter.com

  17. H. Pilori is the most common cause bioweb.uwlax.edu

  18. H. Pilori is the most common cause upload.wikimedia.org

  19. The digestion of carbohydrates Most dietary carbs are polysaccharides Cooper GM. The Cell: A Molecular Approach. 2nd edition.

  20. The digestion of carbohydrates Allcarbohydrates are convertedtomonosaccharidesbeforeabsorption salivary a-amilase 5% starch Maltose salivary a-amilase 25% starch Maltose pancreatica-amilase 70%starch Maltose

  21. The digestion of carbohydrates Disaccharidases at intestinal villitransformdisaccharides in monosaccharides

  22. The digestion of fats web.campbell.edu

  23. Types of diarrhea Osmotic ie. Lactose intolerance Secretory ie. Cholera Malabsoptive ie. Celiac disease Inflammatory ie. Chron’s disease High motility ie. Some medications

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