Hyperemia is defined as which of the following?

Hyperemia is defined as which of the following?

• A. A decrease in blood flow to a body part
• B. A localized vasoconstriction
• C. An increase in the quantity of blood flow to a body part
• D. Complete cessation of blood flow

Answer: (C)

Hyperemia means an increase in the quantity of blood flow to a body part, usually due to dilation of the arterioles that supply the tissue. This augmented inflow delivers more blood for metabolic needs or inflammatory processes, which explains why inflamed or actively working tissues appear red and warm. It’s the opposite of reduced blood flow (hypoperfusion), vasoconstriction (which lowers inflow), or a complete stop in flow (ischemia). In practice, you see hyperemia in active tissues like exercising muscles or inflamed areas, where vasodilation increases perfusion to meet demand.

Hyperemia means an increase in the quantity of blood flow to a body part, usually due to dilation of the arterioles that supply the tissue. This augmented inflow delivers more blood for metabolic needs or inflammatory processes, which explains why inflamed or actively working tissues appear red and warm. It’s the opposite of reduced blood flow (hypoperfusion), vasoconstriction (which lowers inflow), or a complete stop in flow (ischemia). In practice, you see hyperemia in active tissues like exercising muscles or inflamed areas, where vasodilation increases perfusion to meet demand.