Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 37.2, Problem 1TYK
Summary Introduction

Introduction:

Animals share many of the same nutritional requirements, but they obtain and process those nutrients in diverse ways. Once food has been ingested, some of the nutrients from the food must be broken down so that they can be absorbed by the cells of the digestive system.

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Which of the following is NOT a regulatory mechanism for digestion? Only carbohydrates are digested in the oral cavity. Hormones are secreted at various stages of digestion pH of the digestive tract is altered by the release of bicarbonates to the GI tract. Enzyme activation is effected by autocatalysis of zymogens. Cells and different organ systems are involved in the digestion of foodstuffs.
Which of the following descriptions is incorrectly matched to the type of digestion occuring?   Acidic pH of gastric juice helping break down proteins and activate enzymes - mechanical digestion   Salivary amylase breaking down starch - chemical digestion   Peristalsis of the small intestine mixing up chyme - mechanical digestion   bile salts helping to emulsify fats and raise the pH - chemical digestion   chewing and mixing of food in the mouth - mechanical digestion
Match the following processes of the Digestive System to their specific description. Match each item to a choice: Choices: Defecation Digestion Secretion Mixing and propulsion Ingestion Absorption the process by which food material are mixed together and propelled within the GI tract. the process by which micro molecules from the process of digestion are absorbed within the small intestine. the chemical and mechanical process of degrading food material into small particles. the act of taking something (food, medicine, liquid, poison etc.) into the body through the mouth. the process by which undigested food particle are expelled out of the body. the process by which chemical enzymes are secreted by the Digestive System aiding Digestion.
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