Lipoproteins

Question 1

Function of lipoproteins?

Answer 1

transport cholesterol in the blood

Question 2

What is the arrangement of lipoproteins making them useful for cholesterol transport?

Answer 2

outer-glycoproteins

inner-lipid

Question 3

What are the 4 types of glycoproteins?

Answer 3

HDL (high density lipid)
LDL (low density lipid)
VLDL (very low density lipid)
IDL (intermediate density lipid)

Question 4

HDL
where are they formed?
are they good or bad?
protein:lipid ratio?
function?

Answer 4

Formed in the Liver
good, empty cholesterol
highest protein:lipid ratio
Remove cholesterol from blood and cells

Question 5

Where is the cholesterol then taken?

Answer 5

taken to the liver which secreted it into bile or converted into bile salts

Question 6

LDL
where are they formed?
are they good or bad?
protein:lipid ratio?
function?

Answer 6

formed in the plasma
bad
low protein:lipid ratio
deposit cholesterol in cells

Question 7

VLDL
synthesised in?
function?

Answer 7

hepatocytes

carries triglycerides from glucose in liver to adipocytes

Question 8

IDL

function?

Answer 8

Are VLDL intermediates, converted to LDL

Question 9

When is beta oxidation of fatty acids increased?

Answer 9

in fasted (post absorptive state)
increased glucagon
decreased insulin

Question 10

what are the 3 types of beta oxidation?

Answer 10

peroxisomal
mitochondrial (in imms)
CYP4a in ER