Which of the following is the most significant source of blood flow resistance?

Question

Quizplus · Accepted Answer

The most significant source of blood flow resistance is blood vessel diameter. This is because resistance is directly proportional to the fourth power of the radius of the vessel. Therefore, even small changes in vessel diameter can have a significant impact on blood flow resistance. Blood viscosity and total blood vessel length also contribute to resistance, but to a lesser degree. Blood vessel type does not significantly impact resistance.

Which of the Following Is the Most Significant Source of Blood