What is peripheral vascular resistance?

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Multiple Choice

What is peripheral vascular resistance?

Explanation:
Peripheral vascular resistance is the opposition to blood flow in the systemic circulation, mainly generated by the small arteries and arterioles. When these vessels constrict (vasoconstriction), the lumen narrows, so resistance rises and the heart must generate higher pressure to push blood through. This concept helps explain why changes in vessel tone affect blood pressure. It's not about the rate of blood flow through the heart (that’s cardiac output), nor about venous pressure or total blood volume, which are different parts of circulation physiology.

Peripheral vascular resistance is the opposition to blood flow in the systemic circulation, mainly generated by the small arteries and arterioles. When these vessels constrict (vasoconstriction), the lumen narrows, so resistance rises and the heart must generate higher pressure to push blood through. This concept helps explain why changes in vessel tone affect blood pressure. It's not about the rate of blood flow through the heart (that’s cardiac output), nor about venous pressure or total blood volume, which are different parts of circulation physiology.

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