What is the origin of the triacylglycerols transported by very low-density lipoproteins?

Question

Accepted Answer

All right. Hello everyone. So this question is asking us Tri Ao Glycerol synthesized in the liver are transported by which type of lipoprotein option? A says Chylomicron option B says VLDL option C says LDL and option D says HDL. So each of these answer choices represents a different type of lipoprotein. So let's go ahead and discuss them individually. Now, just for the sake of clarity, a light bulb protein are structures composed of both lipids and proteins and their role in the body is to serve as transport vehicles for lipids, allowing them to move in the bloodstream a little bit easier. So starting off with Chylomicron here for option A recall that Chylomicron are responsible for the transport of all dietary lipids. And so Chylomicron can be found in the intestines or the liver and also in adipose or fatty tissue as well as other tissues throughout the body. From here. For option B, we talk about VLDL which stands for very low density lipoproteins. Now, very low density lipoproteins are responsible for transporting tri ao glycerol or tags from the liver. In other words, try Ao Glycerol that were synthesized in the liver. And so these are found in the liver or in adipose tissue for storage or other tissues that need trio glycerol for energy. Moving on. From that, we can talk about LDLs, which stands for low density lipoproteins. And LDL is characteristically known for transporting cholesterol and specifically cholesterol that has been synthesized in the liver. So, it's found in the liver of course and also in various other tissues because of the role of cholesterol in preserving the cell membrane. Now, it's worth mentioning that an excess of LDL or excess cholesterol is often deposited onto the wall of arteries from here. Though we talk about HDLs or high density proteins, lipoproteins which transports cholesterol once again. But this time, it almost rescues cholesterol from dead or dying cells. So these are present throughout the body. And what they do is that they transport cholesterol back into the liver. But some of these lipoproteins can also be excreted after they're converted into bio. So because this question is talking about tri ao Ao Glycerol in the liver. Specifically, our answer is option B in the multiple choice because VLDL is the lipoprotein responsible for transporting them. And so with that being said, thank you so very much for watching. And I hope you found this helpful

What is the origin of the triacylglycerols transported by very low-density lipoproteins?

Verified video answer for a similar problem:

Key Concepts

Triacylglycerols (TAGs)

Very Low-Density Lipoproteins (VLDL)

Lipid Metabolism