NUTR 205 1nd Edition Lecture 9 Outline of Last Lecture I. Digestion in mouthII. PharynxIII. StomachOutline of Current Lecture IV. StomachV. Small intestineVI. Small intestine secretionsCurrent Lecture- Stomach o Churning of stomach muscles to mix food o Little absorption: Water, alcohol, aspirin, acetaminophen (Tylenol) are absorbedo 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 intestineo Narrow tube that is approximately 20 ft longo Main site for digestion and absorptiono Divided into 3 segments Duodenum Jejunum Ileum (largest part of small intestine)o Chime moved by peristalsis and mixed by rhythmic constrictions and segmentationo Undigested substances pass form the small intestines to the large intestines through a sphincter (ileocal sphincter)- Small intestine secretionso Pancreas secretes pancreatic juice containing: Bicarbonate: neutralizes stomach acid Pancreatic amylase: carbohydratesThese 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: fatso Brush border secretes digestive enzymes for: Carbohydrates
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