Of the following, which is most important in affecting vessel resistance?

Question

Quizplus · Accepted Answer

The diameter of a blood vessel, also known as its radius, has the greatest impact on vessel resistance. This is due to the fact that vessel resistance is directly proportional to the fourth power of the vessel radius. Therefore, even small changes in vessel diameter can have a significant impact on vessel resistance. The other factors listed (length of a blood vessel, nature of blood flow, viscosity of the blood) can also affect vessel resistance, but to a lesser extent.

Of the Following, Which Is Most Important in Affecting Vessel