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Ch. 22 The Digestive System

Chapter 22, Problem 22.22a

How does absorption of lipids differ from absorption of carbohydrates and proteins in the small intestine?


a. Lipids are absorbed into a capillary; carbohydrates and proteins are absorbed into a lacteal.

b. Lipids are not absorbed in the small intestine.

c. Lipids are absorbed into a lacteal; carbohydrates and proteins are absorbed into a capillary.

d. They are all absorbed into the same structure.

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Everyone. Let's take a look at this question together which of the following statements about the absorption of lipids in the small intestine is true. Is it answer choice A? They are emulsified by the enzyme lipase. Answer choice B they are directly absorbed by micro vli lining. The small intestine. Answer choice C they are transported in the lymph through Chylomicron or answer choice D all of the above. Let's work this problem out together to try to figure out which of the following answer choices contains a statement about the absorption of lipids in the small intestine. That is true. So, in order to solve this question, we have to recall what we have learned about the absorption of lipids in the small intestine to determine which of the following statements is a true statement starting off with answer choice A which says they are emulsified by the enzyme lipase. Well, we know that the emulsification of lipids in the small intestine is not carried out by the enzyme lipase making answer choice. A a false statement as the emulsification of the lipids in the small intestine is carried out by bio salts. And the enzyme lipase hydrolyzes lipids into fatty acids and glycerol. So answer choice A is incorrect, which means that answer choice D is also incorrect since we're looking for a true statement. And if answer choice A is false, all of the above statements being true is not a possible answer. Choice. Next, we have answer choice B which says that they are directly absorbed by micro vli lining the small intestine, which we can identify. This statement is also a false statement as the lipids in the intestine are not directly absorbed by micro vli lining, the small intestine and instead are absorbed by anoc sites which are the cells lining the small intestine. So answer choice B is a false statement and cannot be the correct answer either leaving us with only answer choice C as the remaining answer choice making answer choice C a true statement. Since answer choice C says they are transported in the lymph through Chylomicron, which we know that after absorption by anoc sites, the lipids are then re esterified and packaged into the Chylomicron to be transported in the lymph. So answer choice C is the only answer choice containing a true statement about the absorption of lipids in the small intestine. I hope you found this video to be helpful. Thank you and goodbye.
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