Cholesterol Flashcards
where is cholesterol found
in the cell membrane, liver and body tissue
what is cholesterols function
to regulate blood fluidity
is cholesterol soluble in water and if so why
its insoluble
non polar and hydrophobic
has to bond to protein in order to be carried in blood
HO (hydroxyl group) is hydrophilic
rest of molecule is hydrophobic
what is LDL
low density lipoproteins
bad cholesterol
what is an LDL made of
triglycerides, proteins and a greater amount of cholesterol than HDL
what is HDL made of
triglycerides, cholesterol and a greater amount of proteins than LDL
is LDL saturated
yes it is saturated (unsaturated fat)
what is LDL role in transport
transports cholesterol from liver to tissue/ membrane
cholesterol binds to LDLR receptors on cell membranes and is taken up into cells
is HDL saturated
no it is unsaturated (healthier fat)
what is HDL role in transport
transports LDL cholesterol from tissue, membrane and arteries back to liver where cholesterol is broken down
important in decreasing blood cholesterol levels
what happens when there is an excess of LDL in the diet
excess LDLs overloads LDLR receptors
results in blood cholesterol levels rising
consequences of saturated fats in the diet
excess build up of LDL levels in blood
begin to build up in artery causing atheroma/ atherosclerosis
what are LDL used for
LDL circulate blood
bind to LDLR receptors on cell membrane
are taken up by cells
involved in maintenance of cell membrane
what are HDL used for
HDL transport cholesterol to liver from body tissues where it is broken down
lowers blood cholesterol levels
helps remove fatty plaque of atheroma’s
