Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Chapter 23, Problem 4ILQ
Watch this animation (http://openstaxcollege.org/l/stomach1) that depicts the structure of the stomach and how this structure functions in the initiation of protein digestion. This view of the stomach shows the characteristic rugae. What is the function of these rugae?
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Watch this animation (http://openstaxcollege.org/l/stomach1) that depicts the structure of the stomach andhow this structure functions in the initiation of proteindigestion. This view of the stomach shows thecharacteristic rugae. What is the function of these rugae?
Watch this animation (http://openstaxcollege.org/l/sintestine) that depicts the structure of the small intestine, and, in particular, the villi. Epithelial cells continue the digestion and absorption of nutrients and transport thesenutrients to the lymphatic and circulatory systems. In the small intestine, the products of food digestion are absorbed by different structures in the villi. Which structure absorbs and transports fats?
The motion of these muscles causes waves of contraction to move down the length of the small intestine. What purpose do these waves of contraction serve?
Chapter 23 Solutions
Anatomy & Physiology
Ch. 23 - By clicking on this link...Ch. 23 - Visit this site...Ch. 23 - Watch this animation...Ch. 23 - Watch this animation...Ch. 23 - Watch this animation...Ch. 23 - By watching this animation...Ch. 23 - Watch this video...Ch. 23 - Which of these organs is not considered an...Ch. 23 - Which of the following organs is supported by a...Ch. 23 - Which of the following membranes covers the...
Ch. 23 - Which of these processes occurs in the mouth?...Ch. 23 - Which of these processes occurs throughout most of...Ch. 23 - Which of the following stimuli activates sensors...Ch. 23 - Which of these statements about reflexes in the GI...Ch. 23 - Which of these ingredients in saliva is...Ch. 23 - Which of these statements about the pharynx is...Ch. 23 - Which structure is located where the esophagus...Ch. 23 - Which phase of deglutition involves contraction of...Ch. 23 - Which of these cells secrete hormones? parietal...Ch. 23 - Where does the majority of chemical digestion in...Ch. 23 - During gastric emptying, chyme is released into...Ch. 23 - Parietal cells secrete ________. gastrin...Ch. 23 - In which pail of the alimentary canal does most...Ch. 23 - Which of these is most associated with villi?...Ch. 23 - What is the roLe of the small intestines MALT?...Ch. 23 - Which part of the large intestine attaches to the...Ch. 23 - Which of these statements about bile is true?...Ch. 23 - Pancreatic juice ________. deactivates bile. is...Ch. 23 - Where does the chemical digestion of starch begin?...Ch. 23 - Which of these is involved in the chemical...Ch. 23 - Where are most fat-digesting enzymes produced?...Ch. 23 - Which of these nutrients is absorbed mainly in the...Ch. 23 - Explain how the enteric nervous system supports...Ch. 23 - What layer of the alimentary canal tissue is...Ch. 23 - Offer a theory to explain why segmentation occurs...Ch. 23 - It has been several hours since you last ate....Ch. 23 - The composition of saliva varies from gland to...Ch. 23 - During a hockey game, the puck hits a player in...Ch. 23 - What prevents swallowed food from entering the...Ch. 23 - Explain the mechanism responsible for...Ch. 23 - Describe the three processes involved in the...Ch. 23 - Explain how the stomach is protected from self...Ch. 23 - Describe unique anatomical features that enable...Ch. 23 - Explain how nutrients absorbed in the small...Ch. 23 - Why is it important that chyme from the stomach is...Ch. 23 - Describe three of the differences between the...Ch. 23 - Why does the pancreas secrete some enzymes in...Ch. 23 - Describe the location of hepatocytes in the liver...Ch. 23 - Explain the role of bile salts and lecithin in the...Ch. 23 - How is vitamin B12 absorbed?
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- List the organs and accessory organs of the digestive system. On a separate piece of paper, list the main functions of each organ.arrow_forwardFigure 34.11 Which of the following statements about the digestive system is false? Chyme is a mixture of food and digestive juices that is produced in the stomach. Food enters the large intestine before the small intestine. In the small intestine, chyme mixes with bile, which emulsifies fats. The stomach is separated from the small intestine by the pylloric sphincter.arrow_forwardExplain the differences between the digestion roles of the small and large intestines. Does the appendix also have a digestive function?arrow_forward
- Figure 34.19 Which of the following statements about digestive processes is true? Amylase, maltaseT and lactase in the mouth digest carbohydrates. Trypsin and lipase in the stomach digest protein. Bile emulsifies lipids in the small intestine. No food is absorbed until the small intestine.arrow_forwardWhat are the main functions of the stomach? What roles do enzymes and hormones play?arrow_forwardFigure 34.12 Which of the following statements about the small intestine is false? Absorptive cells that line the small intestine have microvilli, small projections that increase surface area and aid in the absorption of food. The inside of the small intestine has many folds, called villi. Microvilli are lined with blood vessels as well as lymphatic vessels. The inside of the small intestine is called the lumen.arrow_forward
- Achlorhydria is a condition in which the stomach stops producinghydrochloric acid and other secretions. What effect would achlorhydriahave on the digestive process? On red blood cell count?arrow_forwardWhat is the primary function of the large intestine? Why is this important? Mucus is secreted everywhere along the digestive tract. What purpose does it serve? Why do you think that the number of goblet cells (produce mucus) is so much higher in the large intestine?arrow_forwardFrom 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 externaarrow_forward
- The entire digestive tract contains layers of muscle that contribute to the digestive process. However, these muscle layers are not the same in all parts of the digestive tract. Describe two examples of digestive organs with unique specializations of these muscle layers and how these specializations contribute to the function of the organs where you find them.arrow_forwardWhile most of the digestive tract has two layers of muscle in the muscularis externa (longitudinal and circular), the stomach has a third oblique layer. Based on what you know about the role of the stomach in both mechanical and chemical digestion, why do you think the stomach has this third layer?arrow_forwardWhy doesn’t gastric juice destroy the stomach cells that make it? Identify the cells making up the gastric gland.What contributes to the absorption capacity of the small intestine?arrow_forward
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