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Ch. 22 The Digestive System
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All textbooksErin C. Amerman 2nd EditionCh. 22 The Digestive SystemProblem 22.11a

Chapter 22, Problem 22.11a

Which of the following best describes the microscopic structure of the liver?


a. Hexagonal plates of hepatocytes surrounding a central vein with portal triads at each corner

b. Octagonal plates of hepatocytes surrounding a central artery with portal triads at each corner

c. Irregular groups of hepatocytes surrounding a central vein with bile ducts at each corner

d. Hexagonal plates of hepatocytes surrounding a portal vein with bile ducts at each corner

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Hi, everybody. Welcome back. Our next question says which of the following correctly describes, describes the cup for cells of the liver. A specialized cells that are found primarily in the space of Disi B cells that line the capsule of gly C A type of macrophage found in the liver sinusoids or D fiber cells that are located between the hepatocytes and the sinusoids. So the cer cells of the liver are choice C A type of macrophage found in the liver sinusoids. They sort of monitor as macrophages. They do their job, immune system job of engulfing and breaking down pathogens, damaged cells and foreign particles recall that sinusoids or sinusoidal capillaries are those capillaries that have those sort of big gaps in them that allow the free flow uh and in exchange of plasma and particularly proteins in the liver. And these macrophages that line the sinusoids provide this really essential monitoring role and taking care of these things as materials exchanged between the hepatocytes and the sinusoids. When we look at our other answer choices, choice. A specialized cells found primarily in the space of disy. This space is the very small space between the hepatocytes and sinusoids and the specialized cells that are, there are these stellate cells or hepatic stellate cells that operate to form scar tissue when the liver is damaged, but that these are not the cup for cells. So not what we're looking for. And then Choice B sells the line a capsule of glisten. The capsule of glisten is this outer capsule, a fibrous tissue that surrounds the liver. It has to withstand the changes in size that sometimes occur to the liver. So it's tough and protective. We have that word capsule. That conclusion to the fact that it's a surrounding fibrous uh structure. But again, the cup for cells are within the liver, within the sinusoids, not on that capsule and in the outside. So choice B is incorrect and finally choice D fiber cells that are located between the hepatocytes and the sinusoids. Again, ker cells are not fiber cells, they are macrophages and as we said, they are located in the sinusoids. So trustee is incorrect. So once again, the correct description of the cup for cells of the liver. Choice C A type of macrophage found in the liver sinusoids. 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.

183
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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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Textbook Question

Which of the following best describes the role of bile salts in lipid digestion?


a. Bile salts begin chemical digestion of lipids.

b. Bile salts bind to lipids and physically break them apart into monoglycerides and free fatty acids.

c. Bile salts bind to lipids and physically break them apart into smaller pieces.

d. Bile salts interact with pancreatic lipase and catalyze lipid breakdown.

174
views
Textbook Question

Which of the following is/are absorbed in the small intestine by the Na+/glucose cotransporter?


a. Glucose

b. Galactose

c. Fructose

d. Both a and b are correct.

e. All of the above are correct.

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Textbook Question

The primary hormone that triggers the secretion of pancreatic juice and bile is:


a. gastric inhibitory peptide.

b. cholecystokinin.

c. motilin.

d. somatostatin.

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