Nutrition: Concepts and Controversies
Nutrition: Concepts and Controversies
13th Edition
ISBN: 9781133603184
Author: Frances Sizer, Ellie Whitney
Publisher: Cengage Learning
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Chapter 6, Problem 5SC
Summary Introduction

Introduction:

Protein digestion is a process in which human body’s digestive system breaks down dietary protein into functional amino acids. Further, it is absorbed and utilized by the cells as nutrients for several vital cellular activities.

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From the esophagus to the anal canal, the walls of the digestive tract are made of the same four basic layers.  Arrange them in order from the lumen outward.     mucosa, submucosa, muscularis externa, serosa     mucosa, submucosa, serosa, muscularis externa     muscularis externa, serosa, mucosa, submucosa     serosa, mucosa, submucosa, muscularis externa
Drag and drop each structure or characteristic to the correct intestine. Small intestine Absorbs water and salts Contains rectum Most vitamins are absorbed here Lacteals absorb fat Villi and microvilli increase surface area Contains 3-part colon Digestive enzymes are produced by epithelial lining Smaller diameter Digestive enzymes produced by the pancreas enter here Contains appendix Contains cecum 1-1.5 meters long in adult human Minerals are absorbed here 3 meters long in adult human Stores and concentrates undigested material Nutrients are absorbed here Hydrolytic enzymes break down macromolecules Large intestine
The cephalic phase of digestion: begins when someone smells and initially tastes food. is inhibited by cholecystokinin and secretin from the small intestin. includes the initial steps of chemical protein digestion. Is an immediate response to stomach distension. all of the above..
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