NEET PG DENTAL EXAM

Detailed explanation-1: -Vasodilation is the widening of blood vessels as a result of the relaxation of the blood vessel’s muscular walls. Vasodilation is a mechanism to enhance blood flow to areas of the body that are lacking oxygen and/or nutrients.

Detailed explanation-2: -Specifically in arteries, vasoconstriction decreases blood flow as the smooth muscle in the walls of the tunica media contracts, making the lumen narrower and increasing blood pressure. Similarly, vasodilation increases blood flow as the smooth muscle relaxes, allowing the lumen to widen and blood pressure to drop.

Detailed explanation-3: -When vasodilation occurs, the blood vessel lumens become larger as the muscles of the blood vessel walls dilate, causing the lumen to widen. The human body keeps these two mechanisms in balance to ensure that blood flows at the correct speed and in the proper amounts.

Detailed explanation-4: -Vasodilation, also known as vasorelaxation, is the widening of blood vessels. It results from relaxation of smooth muscle cells within the vessel walls, in particular in the large veins, large arteries, and smaller arterioles. The process is the opposite of vasoconstriction, which is the narrowing of blood vessels.