Intro to Lipid Digestion - Video Tutorials & Practice Problems
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concept
Intro to Lipid Digestion Concept 1
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Everyone. So in this video, we're gonna talk about our intro to lipid digestion here. We're going to say that trio Glycerol, which we abbreviate as tags are the most abundant dietary lipids and are a rich source of energy. Now, unlike glucose, which only produces two acetyl coa molecules. When it comes to tags, we can make a lot of coa molecules per tag. And we're going to say here when it comes to tags, they're mechanically digested in the mouth and the stomach, but they're biochemically digested in the small intestine. Now, here we're gonna say we have A B and C. When it comes to lipid digestion, we're gonna say a deals with grinding in the mouth and churning in the stomach converts lipids into these small droplets which we call globules. And we look at this overview of this image that would happen here. We have our a our, our fatty acid, we have our fats here, mechanical digestion, we're chewing it, we're using our mouths, our stomach helps to mechanically break it down and we're gonna have our fat globules here. They were gonna say mation by bile turned these globules themselves into my cells Now, you're going to say that bile itself, it contains our bio salts as well as emulsifying agents, which will help to change these globules into these my cells. And this is gonna increase their surface area and solubility. So we have our fats which are mechanically broken down in digestion. A here in our image that helps to change these globules into my, into our mice cells eventually. So here we have our fatty globules. They undergo a moss application to the use of bio and bios salts. And remember bile themselves, they contain phos lipids as well as these bios salts, which will help to emulsify our globules into these mice cells. Emulsification is be here. And then we're gonna say emulsification helps to change these globules into our fat mice. And then when we get to see, we have our pancreatic lie pieces. So which would be here, they partially hydrolyze fats or tags to mono oso glycerol and fatty acids. So basically, we're severing these connections here, these ester linkages within our tags to eventually get to our mono oso glycerol right here. And if we look at the image, this represents a hydrolysis product, we've severed semester linkages. So that only one remains when it came to our original fact, right? So this gives us a good overview when it comes to lipid digestion
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example
Intro to Lipid Digestion Example 1
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1m
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Here in this example, question, it says which of the following statements is correct about the role of bile in lipid digestion. So remember when we talked about bio, we said it contained phospho lipids as well as bio acids or salts which help to emulsify or solubilized our globules into my cells. So from that description, which of the following statements most matches up with that idea. So here bile contains bile acids that provide an acidic medium or lipid digestion. Now remember they're helping to solubilized or emulsify our globules into my cells. Bow enzymes make lipids hydrophilic by oxidation. Never referred to this in terms of bile bio salts and lecithin in the buls lipids as a preparation for the subsequent hydrolysis. Yes. Remember in step B of our lipid digestion, we're talking about bio, this is in preparation till we get to step C or we have our pancreatic lie, pas getting involved to help create our hydrolysis products. So this would be true. Bio contains light pieces that hydrolyze lipids to fatty acids and Glycerol. No, that's not what's occurring there. We're changing our tags into mono seo glycerol where severing some ester linkages to get our hydrolysis product. So this would not be true. So the only statement here that is true would have to be option C.
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Problem
Problem
Which of the following statements is incorrect about lipid digestion?
A
Emulsification of fat globules by bile increases their surface area.
B
Triacylglycerols are partially hydrolyzed in the stomach before they enter the small intestine.
C
Triacylglycerols in the small intestine are partially hydrolyzed by pancreatic lipases.
D
Mechanical digestion of lipids takes place inside the mouth and the stomach.
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