Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN: 9781305073951
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 39, Problem 2SQ
Summary Introduction
Introduction: Pepsin is one of the major digestive enzymes that is produced in the stomach of many animals including humans. The gastric gland present in the stomach secretes hydrochloric acid that activates the pepsinogen into pepsin. The acidic environment in the stomach denatures the proteins and exposes the bonds between them. These bonds are cleaved by the pepsin into smaller fragments known as peptides.
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Chapter 39 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 39 - Prob. 1SQCh. 39 - Prob. 2SQCh. 39 - Prob. 3SQCh. 39 - A bird's keratin-lined _______ helps it grind up...Ch. 39 - Monosaccharides and amino acids absorbed from the...Ch. 39 - Human Adaptation to a Starchy Diet The human AMY-1...Ch. 39 - Prob. 2DAACh. 39 - Prob. 3DAACh. 39 - Prob. 6SQCh. 39 - The low pH of the _______ aids in protein...
Ch. 39 - Prob. 8SQCh. 39 - Prob. 9SQCh. 39 - Eating a healthy diet entirely of plant foods...Ch. 39 - Prob. 11SQCh. 39 - _______ is (are) a good source of omega-3 fatty...Ch. 39 - Prob. 13SQCh. 39 - Match each substance with its description. __...Ch. 39 - Match each organ with its digestive function in...Ch. 39 - Some people who have gallstones experience pain...Ch. 39 - A python can survive by eating a large meal once...Ch. 39 - Although rabbits cannot break cellulose down into...
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- The bile from the liver is delivered to the _______. a. stomach b. liver c. small intestine d. colonarrow_forwardFigure 16.7 Which of the following statements about the digestive system is false? a. Chyme is a mixture of food and digestive juices that is produced in the stomach. b. Food enters the large intestine before the small intestine. c. In the small intestine, chyme mixes with bile, which emulsifies fats. d. The stomach is separated from the small intestine by the pyloric sphincter.arrow_forwardBile has a role in _________ digestion and absorption. a. carbohydrate c. protein b. fat d. amino acidarrow_forward
- The digestive juices from the liver are delivered to the ________. a. stomach b. liver c. duodenum d. colonarrow_forwardWhere does the pancreas dump digestive enzymes and buffers into the GI tract? A. it does not dump substances into the GI tract, it dumps substances into blood only B. in the duodenum just after food leaves the stomach C. just before food enters the stomach D. where the small intestine enters the large intestinearrow_forwardThe purpose of Microvilli in the human digestive tract is to: a. kill detrimental bacteria in the esophagus b. emulsify fats c. secrete pepsinogen in the stomach d. absorb nutrients from the small intestine into the bloodstream e. secrete trypsinogen and chymotrypsin into the duodenumarrow_forward
- Protein digestion in the stomach results primarily from secretions released by: (a) hepatocytes. (b) parietal cells. (c) chief cells. (d) goblet cells.arrow_forwardThe primary function of the large intestine is to concentrate wastes into solid form (feces) for release from the body. How does it accomplish this? a. By adding additional cells from the mucosal layer b. By absorbing water c. By releasing salt d. All of these are methods used by the large intestine.arrow_forwardchoice, Chyme arriving in the small intestine would stimulate the beginning of the _________________ phase of stomach activity: A. gastric B. intestinal C. cephalic D. buccalarrow_forward
- Why does not the stomach break itself down? a) The stomach wall does not consist of protein so it is not affected by proteolytic enzymes b) The epithelial cells form a protective layer c) The breakdown enzymes are not strong enough to break down the stomach wall d) The stomach wall is protected by mucusarrow_forwardChemical digestion does not involve… A. stomach acid B. peristalsis C. enzymes D. the salivary glands secreting salivaarrow_forwardWhat do the enzymes pepsin, chymotrypsin, trypsin, and carboxypeptidase have in common?a. They are secreted and active within the stomach.b. They are pancreatic enzymes.c. They are secreted and active within the small intestine.d. They are enzymes that participate in protein digestionarrow_forward
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