Question

In some instances, the levels of LDL cholesterol exceed the ability of the body to maintain homeostasis, and as a result, the excess material accumulates into fatty deposits that harden into plaques. Arrange in the correct order the sequence of events that leads to this condition, known as atherosclerosis:1) The plaques harden, blocking the flow of blood in major arteries.2) White blood cells become engorged with fatty deposits.3) Excess LDL cholesterol accumulates in the interior of arterial walls.4) Macrophages are drawn to this site.

Answer 1

Answer:

The correct order is 3, 4, 2 and 1.

Explanation:

Atherosclerosis refers to the condition in which the plaque gets accumulate within the blood vessels' walls. In the condition, inflammation occurs in the arteries' inner lining. The following is the sequence of events that results in atherosclerosis is:  

1. A huge concentration of LDL cholesterol gets gathered within the inner walls of the arteries.  

2. This causes discharging of macrophages to the site.  

3. The engorgement of WBCs takes place with fatty deposits.  

4. The hardening of plaques takes place, which eventually prevents the flow of blood in the prime arteries.