HDL's
- Made up of unsaturated fats, cholesterol, and proteins
- Tend to carry cholesterol from the body tissues back to the liver. in the liver it contains receptor sites that allow the HDL's to bind to their cell surface membranes
- In the liver the cholesterol is used in cell metabolism (make bile) or is broken down
- High levels of HDL's = reduced blood cholesteol levels
They reduce the fatty deposits in the artery walls by atherosclerosis and may even help in the removal of them. As HDL's are unsaturated they are said to be benefical to health
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