Cholesterol is made in the liver and regulates blood fluidity. It provides stability to cell membranes. Too much LDL cholesterol can block arteries and reduce blood flow, causing heart problems. HDL counters LDL by transporting cholesterol from cells back to the liver to be removed from the body. There are two main types of cholesterol - LDL, which delivers cholesterol to cells and deposits in artery walls, and HDL, which transports cholesterol away from tissues and arteries. High levels of HDL are beneficial while low levels of LDL are preferable. Familial hypercholesterolemia is a genetic condition causing abnormally high cholesterol that runs in families and increases heart disease risk.

1. Cholesterol

2. Features of Cholesterol

3. Uses of Cholesterol
Cholesterol is made in the liver and regulates the fluidity of the bloodstream
It also provides stability to the membranes. Without cholesterol the membrane would easily
split apart.
Too much LDL will block the arteries. This reduces blood flow and so will cause major heart
problems.
HDL counteracts the LDL.

4. Types of Cholesterol
Since Cholesterols doesn’t dissolve well in the blood, it needs to attach itself to fatty protein
to circulate through the body.
HDL- Function is to transport cholesterol from the cells and tissues back to the liver to be
processed and expelled from the body.Thus, removes Cholesterol from the cells and arteries.
LDL- Function is to deliver cholesterol to cells where it is used in membranes or for the
synthesis of steroid hormones. LDL Cholesterol is referred to as the bad cholesterol because
it deposits its cholesterol on the walls of arteries.LDL becomes oxidised and damages the
lining of your arteries, settling the stage for mineral and fat deposits.

5. Comparing different types of
Cholesterol
HDL
● High density lipoprotein
● ‘Good’ Cholesterol
● Transports cholesterol from cells and
tissues to liver.
● Stable Molecule
● The higher the levels the better.
LDL
● Low density lipoprotein
● ‘Bad’ Cholesterol
● Transports cholesterol from and to
cells
● Unstable molecule - easily oxidised
● The lower the level the better.

6. Familial Hypercholesterolaemia
Familial Hypercholesterolaemia is the medical term for high cholesterol that runs in families.
It's caused by gene alteration inherited from a parent.
It can lead to heart problems
There is a 50% chance that a brother, sister or child will inherit he condition.