It Fatty substance Essential in the formation of Membranes Cells In all tissues of organisms. In addition to playing a central role in cholesterol Metabolism Is vital for most organisms Eukaryotes This productionSterols (Any compound that results from a merger between Steroid And Alcohol )., But it exists in abundance in animal tissues and small amounts in tissues Plant And Fungi . Represents cholesterol as well as the basic building block in the formation of steroid hormones and vitamin (d ). .
Moves cholesterol from the liver to the tissues of the body through the blood by lipoproteins Where the cells take their need him and continue to increase in the bloodstream is picked up other lipoproteins to put it back to the liver.
There are two types of lipoproteins:
1 - low density lipoproteins Low Density Lipoproteins And denoted by LDL And are proteins that carry cholesterol from the liver to the tissues of the body, and contain a large amount of it is the so-called "LDL cholesterol."
2 - high-density lipoproteins High Density Lipoproteins And denoted by HDL And are proteins that pick up cholesterol from the bloodstream after taking the cells need it and bring it back to the liver to enter again in the formation of low-density lipoproteins to move it back to the cells of the body or enters in the composition of secreted bile Bile , And these proteins contain a low amount of cholesterol and is the so-called "beneficial cholesterol or HDL."
And this remains a system balanced unless increases the amount of cholesterol for much that can be collected quickly or decrease the amount of proteins high density to do collect cholesterol from the blood, cholesterol is deposited in the walls of blood vessels (arteries), causing hardening and blockage leading to heart disease such as angina and heart attacks and peripheral arterial disease such as inadequate blood flow to the man as well as stroke.
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