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Digestion and Absorption of the Food Nutrients Chapter 3 Part 3 GI Tract Disorders Factors influencing GI function Emotional state Intestinal cramping, queasy stomach Exercise - moderate Reduces liver disease Gallstones Constipation Colon cancer GI Tract Disorders Factors influencing GI function Exercise – high intensity GERD Hiatal hernia Irritable bowel syndrome Viral gastroenteritis GI Tract Disorders More frequent in women Common in young athletes Infrequent in gliding movement sports Cycling Serious medical conditions GI Tract Disorders Constipation Defecation habits are different among people. Difficult or infrequent evacuation Many causes are possible. Ignoring normal urges Muscle spasms Slows feces movement Certain medications and supplements Antacids, calcium, iron GI Tract Disorders Constipation Colonic irrigation is the internal washing of the large intestine and can be hazardous. Strategies High-fiber diet Increased fluids Exercise regularly. Respond quickly to the urge to defecate. GI Tract Disorders Laxatives Can work on the intestinal nerve plexus or mucosal surface Bulk producing laxatives Stool softeners Milk of magnesia Hyperosmotic agents Dulcolax Hydrating agents Bran Glycerol Draw water into the large intestine Regular use can be harmful Decreases muscle action of large intestine GI Tract Disorders Belching and Gas Strategies Eat slowly. Chew thoroughly. Relax while eating. Watch bothersome foods. Hiccups are triggered by eating or drinking too fast. GI Tract Disorders Hemorrhoids may be a problem. Swollen veins of the rectum and anus Intense pressure and straining Dietary recommendation: Fiber and fluid GI Tract Disorders Diarrhea: 2009-1.5 million deaths worldwide Frequent, loose, watery stools Irritable bowel syndrome or colitis Infections-bacteria, viruses Cause excess intestinal secretions GI Tract Disorders Types of Diarrhea Secretory Osmotic Increased motility, diabetic neuropathy Inflammatory Crohn’s disease (blood in bowel) Motility related Lactose intolerance, high sugar solutions (particularly during ex.) Exudative Increased secretion or reduced absorption of fluids Cholera (secretes Cl- into intestinal lumen, Na+ follows) Infections Dysentery Blood in stool, caused by salmonella poisoning, for ex. GI Tract Disorders Diverticulosis Diverticulitis Intestinal walls weaken and bulge. The bulging pockets are called diverticula Worsened condition – inflammation Requires intervention - surgery Increase fiber intake GI Tract Disorders Heartburn Lower esophageal sphincter – relaxes Reflux Painful Acid from stomach reaches esophagus and irritates lining GI Tract Disorders Heartburn and Acid Indigestion Strategies Small meals Liquids between meals Sit up while eating. Wait 1 hour after eating before lying down. Wait 2 hours after eating before exercising. Refrain from tight-fitting clothing. Avoid bothersome foods. Refrain from tobacco use. Lose weight if overweight. GI Tract Disorders Gastroesophageal Reflux Disease (GERD) Backward flow of stomach contents into the esophagus. Exercise exacerbates GERD > 60% athletes Worst in weightlifters Mild in endurance runners GI Tract Disorders Antacids and acid controllers may help indigestion. 4 hr from evening meal to bed Avoid exercising after eating Avoid foods that relax sphincter Chocolate, peppermint, coffee, alcohol, tobacco, GI Tract Disorders Irritable Bowel Syndrome Symptoms Cramps, bloating, increased frequency, diarrhea, constipation Causes Altered intestinal peristalsis Decrease pain threshold GI Tract Disorders Individualized treatment Elimination diet-dairy, gas-forming foods (cabbage, beans), some fruit-grapes, cherries high fiber foods Moderate caffeine, avoid dairy Low-fat, small, frequent meals Stress reduction Choking Food becomes lodged in the trachea. The larynx cannot make sounds. The Heimlich maneuver may need to be used. Strategies Small bites Chew thoroughly. Don’t talk or laugh with food in the mouth. Don’t eat when breathing hard. Ulcers Peptic ulcer Area of GI tract eroded by gastric acid, pepsin Exposes nerves 15% stomach 85% duodenal Diet Soluble fiber – fruits, vegetables: protective Refined sugar: increases risk Ulcers Treatment Antibiotics Helicobacter pylori Proton pump (H+) inhibitors Cause of most ulcers Keep HCL from forming Antacids Neutralize stomach acids Vomiting Body’s adaptive mechanism Dehydration is a concern. May be self-induced as in eating disorders