A middle-aged man has been diagnosed as being at high-risk of developing coronary artery disease. State the chemical composition of the sterol that is present in high levels in most people who belong...

A middle-aged man has been diagnosed as being at high-risk of developing coronary artery disease.

State the chemical composition of the sterol that is present in high levels in most people who belong to the high-risk group.

  • Distinguish between the ‘good' and ‘bad' forms of this sterol.
  • Explain the function of the good form of this sterol in the body.
  • List the food groups that are the sources of the bad form.



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pacorz eNotes educator | Certified Educator

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Cholesterol is an important body molecule; it is a key component of cell membranes and a precursor to a number of hormones and to vitamin D. Cholesterol is synthesized in the human body by the liver, and may also be consumed as part of the diet; on average, about 75%-85% of one's total body cholesterol is made within the body, and the remainder is obtained from food.

The cholesterol molecule is made up of a series of carbon rings; there are three 6-carbon rings side by side, with a 5-carbon ring on one end. The molecule has the formula C27H46O.

The body transports cholesterol by producing...

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cassielargy | Student

1. Cholesterol C27H46O

2. During transport, cholesterol exist often exist as lipoprotein form. which mean a large molecule contain both cholesterol and protein. The good form high density lipoprotein (HDL)contain more protein less lipid and bad form contain more lipid than protein.

3.it's used to synthiesis steriod hormones. HDL and their protein and lipid constituents also help to inhibit HDL and their protein and lipid constituents help to inhibit oxidation, inflammation, activation of the endothelium, coagulation, and platelet aggregation.

4.animal product. cheese, egg youls,beef, pork, poultry, fish, shrimp