The relationship of blood flow (Q), resistance (R), and pressure (P) in a vessel can be expressed by which equation?

Option A, Q = P/R

Explanation:

Complete question is

The relationship of blood flow (Q), resistance (R), and pressure (P) in a vessel can be expressed by which equation?

A. Q = P/R.

B. Q = R/P.

C. Q = PQ.

D. P = Q/ R

Solution

As we know that  

Resistance in blood flow is directly proportional to the blood pressure and inversely proportional to the blood flow. This can be represented as  

R ∝ P

R ∝ 1/Q

On combining the above two equations , we will get the following

R ∝ P/Q

R = KP/Q

Where K is the proportionality constant.

Resistance in blood flow arises when the blood vessels constricts or there is some blockage in the blood vessel or wall of the blood vessel creates higher frictional force.

This resistance increases the pressure but the flow reduces.

Hence, option A is correct