NEET PG DENTAL EXAM

Detailed explanation-1: -The term “vasodilation” refers to a widening of the blood vessels within the body. This occurs when the smooth muscles in the arteries and major veins relax. Vasodilation occurs naturally in response to low oxygen levels or increases in body temperature.

Detailed explanation-2: -Vasoconstriction is a response to being too cold. The process involves the narrowing of blood vessels at the skin surface to reduce heat loss through the surface of the skin. Vasodilation is a response to being too hot.

Detailed explanation-3: -During exercise, oxygen delivery to skeletal muscle is elevated to meet the increased oxygen demand. The increase in blood flow to skeletal muscle is achieved by vasodilators formed locally in the muscle tissue, either on the intraluminal or on the extraluminal side of the blood vessels.

Detailed explanation-4: -The cutaneous vascular response to acute dynamic exercise involves a transient reduction in skin blood flow at the onset of exercise mediated by increased cutaneous sympathetic vasoconstrictor outflow (Blair et al., 1961; Bevegard & Shepherd, 1966; Zelis et al., 1969; Kellogg et al., 1991).