Seeley's Anatomy & Physiology
11th Edition
ISBN: 9781259254963
Author: Jennifer Regan (author), Andrew Russo (author), Rod Seeley (author) Cinnamon Vanputte (author)
Publisher: McGraw Hill Higher Education
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Textbook Question
Chapter 24, Problem 1RAC
Which layer of the digestive tract is in direct contact with the foodthat is consumed?
a. mucosa
b. muscularis
c. serosa
d. submucosa
Expert Solution & Answer
Summary Introduction
Introduction:
Three types of glands are associated with the digestive tract. These are unicellular mucous glands present in the mucosa, multicellular glands present in the mucosa and submucosa, multicellular glands present outside the digestive tract.
Answer to Problem 1RAC
The correct answer is option (a) mucosa.
Explanation of Solution
Explanation/justification for the correct answer:
Option (a) mucosa. The mucosa is the inner tunic of the digestive tract, and it surrounds the lumen of the digestive tract. Therefore, the mucosa is in direct contact with ingested substances. So, the correct answer is option (a).
Explanation for incorrect answer:
Option (b) muscularis. It is the middle tunic of the digestive tract and does not come in contact with the lumen. Hence, the given option is not correct.
Option (c) serosa. It is the external layer of the mucosa. It does not interact with food substances. Hence, the given option is not correct.
Option (d) submucosa. It is present next to the mucosa and does not connect with the lumen of the digestive tract. Hence, the given option is not correct.
Conclusion
The mucosa is the innermost tunic and in direct contact of ingested food. Hence, the correct answer is option (a) mucosa.
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Chapter 24 Solutions
Seeley's Anatomy & Physiology
Ch. 24.1 - Prob. 1AYPCh. 24.2 - Describe each of the functions involved in the...Ch. 24.2 - Prob. 3AYPCh. 24.2 - What is the difference between mechanical...Ch. 24.2 - What digestive functions occur in the stomach? In...Ch. 24.3 - What are the major tunics of the digestive tract...Ch. 24.3 - What types of tissue are found in each tunic?Ch. 24.3 - In what tunics of the digestive tract are the...Ch. 24.3 - How do the serosa and adventitia differ?Ch. 24.4 - Prob. 10AYP
Ch. 24.4 - What chemical mechanisms regulate the digestive...Ch. 24.5 - Where are the viscera/ peritoneum and parietal...Ch. 24.5 - Prob. 13AYPCh. 24.5 - What are the mesenteries? Name and describe the...Ch. 24.6 - Prob. 15AYPCh. 24.6 - Prob. 16AYPCh. 24.6 - Prob. 17AYPCh. 24.6 - Prob. 18AYPCh. 24.6 - Prob. 19AYPCh. 24.6 - List the three parts of a tooth. What are dentin,...Ch. 24.6 - List the muscles of mastication and the actions...Ch. 24.6 - Name and give the location of the three largest...Ch. 24.6 - Prob. 23AYPCh. 24.6 - Prob. 24AYPCh. 24.6 - Prob. 25AYPCh. 24.7 - Name the parts of the pharynx involved with...Ch. 24.7 - Where is the esophagus located? Describe the...Ch. 24.7 - What are the three phases of swallowing?...Ch. 24.8 - Describe the parts of the stomach. List the tunics...Ch. 24.8 - Prob. 30AYPCh. 24.8 - Name the types of cells in the stomach and the...Ch. 24.8 - Describe three phases of regulation of stomach...Ch. 24.8 - How ore gastric secretions inhibited? Why is this...Ch. 24.8 - As the stomach fills, why does the pressure not...Ch. 24.8 - Name two kinds of stomach movements. How are...Ch. 24.9 - Name and describe the three parts of the small...Ch. 24.9 - What are the circular folds, villi, and microvilli...Ch. 24.9 - Name the four types of cells found in the...Ch. 24.9 - Prob. 39AYPCh. 24.9 - Prob. 40AYPCh. 24.9 - Prob. 41AYPCh. 24.9 - Prob. 42AYPCh. 24.10 - Prob. 43AYPCh. 24.10 - Diagram the duct system from the liver....Ch. 24.10 - Describe the flow of blood to and through the...Ch. 24.10 - Explain and give examples of the major functions...Ch. 24.10 - Prob. 47AYPCh. 24.11 - Prob. 48AYPCh. 24.11 - What is the function of the gallbladder? What...Ch. 24.12 - Describe the parts of the pancreas responsible for...Ch. 24.12 - Name the two kinds of exocrine secretions produced...Ch. 24.12 - What enzymes are present in pancreaticjuice?...Ch. 24.13 - Prob. 53AYPCh. 24.13 - Prob. 54AYPCh. 24.13 - Prob. 55AYPCh. 24.13 - Prob. 56AYPCh. 24.13 - Prob. 57AYPCh. 24.14 - Describe the mechanism of absorption and the route...Ch. 24.14 - Prob. 59AYPCh. 24.14 - Explain how lipids are emulsified. Describe the...Ch. 24.14 - Explain how tripeptides, dipeptides, and amino...Ch. 24.14 - Describe the movement of water through the...Ch. 24.14 - Prob. 63AYPCh. 24.15 - Prob. 64AYPCh. 24.15 - Prob. 65AYPCh. 24.15 - Prob. 66AYPCh. 24 - Which layer of the digestive tract is in direct...Ch. 24 - The ENS is found in the submucosa layer. the...Ch. 24 - Dentin forms the surface of the crown of the...Ch. 24 - The number of premolar deciduous teeth is a. 0.b....Ch. 24 - Which of these glands does not secrete saliva into...Ch. 24 - The portion of the digestive tract in which...Ch. 24 - Prob. 7RACCh. 24 - The stomach a. has large folds in the submucosa...Ch. 24 - Prob. 9RACCh. 24 - Prob. 10RACCh. 24 - Prob. 11RACCh. 24 - Prob. 12RACCh. 24 - Which cellsin the small intestine have digestive...Ch. 24 - Prob. 14RACCh. 24 - Prob. 15RACCh. 24 - The gallbladder a. produces bile. b. stores bile....Ch. 24 - Prob. 17RACCh. 24 - Prob. 18RACCh. 24 - Defecation a. can be initiated by stretch of the...Ch. 24 - Which of these structures...Ch. 24 - Prob. 21RACCh. 24 - Prob. 22RACCh. 24 - Prob. 23RACCh. 24 - Which of these lipoprotein molecules transports...Ch. 24 - Prob. 1CTCh. 24 - Prob. 2CTCh. 24 - Prob. 3CTCh. 24 - Prob. 4CTCh. 24 - A patient has a spinal cord injury at level L 2....Ch. 24 - Prob. 6CTCh. 24 - Prob. 7CTCh. 24 - Prob. 8CT
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