Which is the most significant factor affecting peripheral resistance?
A) Blood viscosity
B) Blood vessel length
C) Blood vessel diameter
D) Blood pH

Question

Quizplus · Accepted Answer

Blood vessel diameter is the most significant factor affecting peripheral resistance because it is directly proportional to the fourth power of the vessel radius according to the Poiseuille's Law. This means that even small changes in the diameter of a blood vessel can have a large impact on the resistance to blood flow. Blood viscosity, blood vessel length, and blood pH can also affect peripheral resistance, but to a lesser extent than blood vessel diameter.

Which Is the Most Significant Factor Affecting Peripheral Resistance