Elevated HDL concentrations are associated with a low risk of heart disease because they:
A)transport newly absorbed lipids from intestinal cells to the rest of the body.
B)carry cholesterol and triglycerides from the liver to the rest of the body.
C)carry lipids around in the blood more than LDL.
D)take excess cholesterol and phospholipids from the tissues and return them to the liver.

Question

Quizplus · Accepted Answer

Elevated HDL concentrations are associated with a low risk of heart disease because HDL particles take excess cholesterol and phospholipids from the tissues and return them to the liver, where they can be broken down and excreted from the body. This process helps to prevent the buildup of cholesterol in the arteries, which can lead to atherosclerosis and heart disease. Elevated HDL concentrations are associated with a lower risk of heart disease because HDL particles take excess cholesterol and phospholipids from the tissues and return them to the liver for processing and excretion. This process is known as reverse cholesterol transport and helps to prevent the buildup of cholesterol in the blood vessels that can lead to heart disease. HDL does not transport newly absorbed lipids from intestinal cells or carry cholesterol and triglycerides from the liver to the rest of the body, as these functions are primarily performed by other lipoprotein particles such as chylomicrons and LDL. While HDL does carry lipids in the blood, this is not the primary mechanism by which they protect against heart disease.

Elevated HDL Concentrations Are Associated with a Low Risk of Heart