NS 1150 Lecture Notes - Lecture 3: Esophagus, Stomach, Dental Caries

• School: Cornell University
• Department: Nutritional Science
• Course: NS 1150
• Professor: David Levitsky

Document Summary

Bacteria live inside intestines: make up most of weight of your waste. Signals from the outside signal gi tube long tube: senses are activated, food primes. Smell, sight of food or things related to food: cephalic phase of digestion. Sequence of events that optimize absorption of food into tissues. Parasympathetic effect of food stimuli: stimulates salivary secretions, tightens the esophageal sphincter. Sits on the stomach and will tighten stomach so acids don"t come up and irritate the trachea and esophagus. Allow to swallow: relaxes gastric muscle tone, stimulates gastric mucous secretions, stimulates gastric secretion, sensitizes insulin release from pancreas. Insulin critical for nutrients to get into cells: directs thought to eating. Amylase=breaks starches into simple sugars (polysaccharides into disaccharides: tongue notices sweetness of starches, signal to brain, sweetness=energy signals insulin production. Notes on antibacterial properties: nursing bottle syndrome. Bacteria will start multiply in the mouth break down bone tissue.