LDL or IDL.

[The8]

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Which one is more dense, LDL or IDLs.... because VLDLs are less dense but it seems that LDLs are listed as more dense than IDLs.

 

[laczlacylaci]

VLDL=very light density lipoproteins
IDL=intermediate light density lipoproteins
LDL=light density lipoproteins
HDL=high density lipoproteins

 

[betterfuture]

Dense just refers to the amount of proteins, I believe. IDL would fall somewhere in the middle. Chylomicrons are the least dense. HDL are the most.

 

[laczlacylaci]

VLDL=very light density lipoproteins
IDL=intermediate light density lipoproteins
LDL=light density lipoproteins
HDL=high density lipoproteins
View attachment 207870

Edit: I like to think about it within the name lipoPROTEINS. HDL=higher level of proteins. VLDL=lowest level of proteins.

 

[kryptonxenon]

What do we need to know about these different lipoproteins for the exam? And LDL transports cholesterol in the blood?

 

[betterfuture]

What do we need to know about these different lipoproteins for the exam? And LDL transports cholesterol in the blood?

Yes. LDL transports cholesterol to blood vessels and the reason why it is associated with plaque build up and high blood pressure. I would not go into much details with the specifics of their structure and all but just know

Chylomicron: Delivery of mostly TAG from small intestine to liver
VLDL: Delivery of mostly TAG from liver to adipose tissues
IDL: intermediate and can carry TAGs or cholesterol
LDL: delivery of cholesterol to blood vessels
HDL: delivery of cholesterol from blood vessels to steriodogenic tissues i.e. liver

 

[wizzed101]

Yes. LDL transports cholesterol to blood vessels and the reason why it is associated with plaque build up and high blood pressure.

eh?
Don't assume this knowledge. Go with whatever the passage tell you.

You can also look up how and where VLDL, IDL, LD and HDL are assembled. Fascinating stuffs and full of misconceptions!

 

[The8]

That is definitely wrong.... LDL are bad cholesterol.... HDL picks up cholesterol from accumulating.

 

[laczlacylaci]

It'll just be important to know:
chylomicron-delivers lipids from intestine to make FA in adipose or can turn into TAG in the liver.
VLDL-picks up TAG from liver to become FA in adipose
LDL-like you said bad cholesterol, can brings cholesterol into cells throughout your body and causes buildup in your arteries.
HDL- like you said bad cholesterol, can benefit your health by carrying those cholesterol away from your heart and other organs and deliver it back to your liver.