Chapter 25 Quiz

25 July 2022
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The enterogastric reflex serves to __________.
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inhibit gastric motility when there is chyme in the small intestine
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Which of the following nutrients is absorbed by the lacteals of the small intestine?
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Triglycerides
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The layer that is responsible for the motility that propels food and residue through the digestive tract is called the __________.
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muscularis externa
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Necessary for Vitamin B12 absorption, __________ is/are secreted by __________ cells.
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intrinsic factor; parietal
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An example of chemical digestion is the break down of __________ into __________.
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nucleic acids; nucleotides
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Which of the following is not a function of gastric hydrochloric acid (HCl)?
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...Emulsify lipids
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Which of the following is not normally found in saliva?
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Protease
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The small intestine is suspended from the abdominal wall by the ___________.
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mesentery
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Which of the following is not a process carried out by bacterial flora?
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Digestion of most of the proteins we get in the diet
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The enzyme(s) called __________ break(s) down the substrate called __________.
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peptidases; proteins
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A hepatic triad consists of __________.
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a bile ductule, a branch of the hepatic artery, and a branch of the hepatic portal vein
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The __________ gland is an extrinsic salivary gland, whereas the __________ gland is an intrinsic salivary gland.
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submandibular; lingual
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The physiological process that moves a nutrient from the outside of the body to the inside is called __________.
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absorption
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Which of the following is not associated with the large absorptive surface of the small intestine?
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Rugae
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Each of the following lists some of the tissue layers of the digestive tract. Which one has them in correct order from lumen to external surface?
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Lamina propria, muscularis mucosae, submucosa, muscularis externa, serosa
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The swallowing center is located in the __________.
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medulla oblongata
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Acid reflux into the esophagus ("heartburn") is normally prevented by __________.
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the lower esophageal sphincter (LES)
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Defecation is stimulated by __________.
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stretching of the rectum
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The __________ synthesizes bile acids by metabolizing __________.
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liver; cholesterol
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The __________ stores excess glucose and releases it into the blood when needed.
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liver
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The serous membranes that suspend the stomach and intestines from the abdominal wall are called __________.
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mesentaries
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Pepsinogen is produced by __________ and is activated by __________, which is secreted by __________.
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chief cells; hydrochloric acid (HCL) secreted by parietal cells
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Of the following components of bile, only __________ has/have a digestive function.
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bile salts
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Pancreatic enzymes are secreted in response to a hormone called __________.
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cholecystokinin (CCK)
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The three most abundant classes of nutrients are?
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fats, proteins, carbs
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Which of the following is not an accessory organ of digestion?
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spleen
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The __________ regulates the flow of contents from the stomach to the duodenum.
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pyloric sphincter
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Carbohydrate digestion begins in the __________, whereas protein digestion begins in the __________.
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mouth;stomach