The resistance in the vessel when it constricts to one-third of its previous radius. Introduction: The flow of blood within the blood vessels is directly proportional to the pressure difference between the two ends of the tube. Same pressure at both the ends does not allow the flow of blood. The vasoconstriction elevates the resistance to blood flowing in vessels and decreases the blood flow whereas, the vasodilation reduces the resistance to blood flow and raises the blood flow through the vessels.

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Chapter 14, Problem 42RA

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The resistance in the vessel when it constricts to one-third of its previous radius.

Introduction:

The flow of blood within the blood vessels is directly proportional to the pressure difference between the two ends of the tube. Same pressure at both the ends does not allow the flow of blood. The vasoconstriction elevates the resistance to blood flowing in vessels and decreases the blood flow whereas, the vasodilation reduces the resistance to blood flow and raises the blood flow through the vessels.

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