Under which of these circumstances does vascular resistance increase
A)when radius decreases
B)when length decreases
C)when viscosity decreases
D)when haematocrit decreases

Question

Quizplus · Accepted Answer

Vascular resistance is directly proportional to radius in the vessel. As the vessel radius decreases, the resistance to blood flow also increases. Length, viscosity, and hematocrit do not directly affect vascular resistance.

Under Which of These Circumstances Does Vascular Resistance Increase