NEET PG DENTAL EXAM

Detailed explanation-1: -Vasodilation caused by relaxation of smooth muscle cells in arteries causes an increase in blood flow. When blood vessels dilate, the blood flow is increased due to a decrease in vascular resistance. Therefore, dilation of arteries and arterioles leads to an immediate decrease in arterial blood pressure and heart rate.

Detailed explanation-2: -The site of local regulation of blood flow is the microcirculation, which is composed of a network of blood vessels-arterioles, capillaries and venules-whose functions are regulation oftissueperfusion and exchange of substances between blood and tissue.