NUTR 205 1nd Edition Lecture 9 Outline of Last Lecture I Digestion in mouth II Pharynx III Stomach Outline of Current Lecture IV Stomach V Small intestine VI Small intestine secretions Current Lecture Stomach o Churning of stomach muscles to mix food o Little absorption Water alcohol aspirin acetaminophen Tylenol are absorbed o End result chime Leaves the stomach to enter the small intestine through a sphincter pyloric sphincter Stomach is emptying is regulated by signals from the small intestines and is affected by meal size and composition Small intestine o Narrow tube that is approximately 20 ft long o Main site for digestion and absorption o Divided into 3 segments Duodenum Jejunum Ileum largest part of small intestine o Chime moved by peristalsis and mixed by rhythmic constrictions and segmentation o Undigested substances pass form the small intestines to the large intestines through a sphincter ileocal sphincter Small intestine secretions o Pancreas secretes pancreatic juice containing Bicarbonate neutralizes stomach acid Pancreatic amylase carbohydrates These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Pancreatic proteases proteins Pancreatic lipases fats o Brush border secretes digestive enzymes for Carbohydrates Proteins
View Full Document
Unlocking...