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Ch. 22 The Digestive System
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All textbooksErin C. Amerman 2nd EditionCh. 22 The Digestive SystemProblem 22.10a

Chapter 22, Problem 22.10a

Which of the following statements about accessory organ secretions is not true?


a. Hepatocytes produce bile, which drains out of the liver via the common hepatic ducts.

b. Saliva contains secretory IgA and lysozyme, which play an important role in preventing the growth of pathogenic bacteria in the oral cavity.

c. Pancreatic juice contains digestive enzymes and bicarbonate ions to neutralize the acidic chyme.

d. The gallbladder produces bile, which drains out of the gallbladder via the cystic duct.

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Hi, everybody. Welcome back. Our next problem says bile is one of the secretions from the digestive system's accessory organs, which of the following states its function. A aids in the emulsification and digestion of fats. B moistens and lubricates. Food C creates an acidic environment in the stomach or d break down carbohydrates into simpler sugars. So when we think of bile, we should always, our mind should just jump straight to fats. Its function is choice a aiding in the emulsification and digestion of fats. Emulsification is important. It breaks the fats down into smaller droplets that increases their surface area. And that increased surface area allows greater access to the lipase enzymes which are what breaks down the fats. So by breaking it down into small droplets, by emulsifying the fat. It allows digestion of the fat to proceed more quickly. When we look at our other answer choices. Just to be thorough here. Choice B moistens and lubricates food. Well, this is the purpose of saliva produced by the salivary glands in the mouth. Obviously, choice c acidic environment in the stomach would be the acid produced by the stomach or specifically, you could say the gastric acid. So choice C is not our answer. And then choice D break down carbohydrates into simpler sugars. That's the role of both salivary and pancreatic amyas in the mouth and the small intestine. So some amylase is released in saliva and begins that breakdown of larger, more complex carbohydrates. And then the process is completed in the small intestine but not the main purpose of bile. So not our answer. So again, that function of bile is choice A A I DS and the emulsification and digestion of bats. See you in the next video.
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Related Practice
Textbook Question

Mr. Williams presents to your clinic with a complaint of abdominal pain in the right upper quadrant. He says that the pain worsens when he eats, particularly when he eats fatty meals. He has noticed that his stool has been an unusual clay color recently. You perform an ultrasound of his abdomen and find that gallstones are blocking his common bile duct, preventing bile from entering the duodenum.



a. Why are his symptoms worse when he consumes a high-fat meal? Would you expect his symptoms to worsen or lessen when he consumes a meal consisting only of carbohydrates? Explain.

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Textbook Question

Mr. Williams presents to your clinic with a complaint of abdominal pain in the right upper quadrant. He says that the pain worsens when he eats, particularly when he eats fatty meals. He has noticed that his stool has been an unusual clay color recently. You perform an ultrasound of his abdomen and find that gallstones are blocking his common bile duct, preventing bile from entering the duodenum.



b. You test Mr. Williams's stool and find high amounts of undigested fats. Explain this finding.

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Textbook Question

Mr. Williams presents to your clinic with a complaint of abdominal pain in the right upper quadrant. He says that the pain worsens when he eats, particularly when he eats fatty meals. He has noticed that his stool has been an unusual clay color recently. You perform an ultrasound of his abdomen and find that gallstones are blocking his common bile duct, preventing bile from entering the duodenum.



c. Explain why his feces have become a clay color instead of a normal brown color.

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