The complete question is as follows;
Atherosclerosis is characterized by the buildup of arterial plaque. When plaque first begins to form, on which part of the blood vessel do the monocytes bind after taking in cholesterol-rich lipoproteins?
Answer: Endothelial lining
Explanation:
Atherosclerosis is a condition in which the fatty deposits develop in the blood vessels and which slows down or restricts the movement of blood in the blood vessels. This condition is also called as the hardening of the arteries. The condition develop due to build up of the fatty deposits like fatty acids, cellular wastes, calcium and cholesterol-rich lipoproteins. These deposits results in the development of the blood clots or plaques in the blood vessels which restricts the flow of blood.
The atherosclerosis or the formation of the plaque generally result in the inner lining of the blood vessel or the endothelial lining of the blood vessel.