Which of the Following is Normally the Greatest Source Acting

Question

Which of the following is normally the greatest source acting against blood flow?
A) vascular resistance
B) venous pressure
C) viscosity of blood
D) vessel length
E) turbulence

Accepted Answer

Vascular resistance, also known as peripheral resistance, is the force that opposes blood flow in the blood vessels. It is determined by a combination of factors including the diameter of the blood vessels, the elasticity of their walls, and the viscosity of blood. Vascular resistance is the largest contributor to overall blood flow resistance in the circulation.