Which of the Following Will Increase Flow in a Vessel

Question

Which of the following will increase flow in a vessel the most?
A) decrease length by 1 unit
B) increase radius by 1 unit
C) decrease viscosity by 1 unit
D) All have the same effect on flow.

Accepted Answer

According to Poiseuille's Law, flow is directly proportional to the fourth power of the radius and inversely proportional to both the length and viscosity. Therefore, increasing the radius by 1 unit will have the greatest effect on increasing flow.