2. Two tributaries (identified here as A and B) of equal length exit the aorta a

Question

2. Two tributaries (identified here as A and B) of equal length exit the aorta at the same distance from the heart, so that the blood pressure at the entrances to the two tributaries is identical. The radius of tributary A is 1.5 times that of tributary B, while all other blood parameters are identical. What is the predicted relative blood flow (that is, volume flow) in tributary A compared with that in tributary B? ENTER THE ANSWER HERE-The volume flow through tributary A is greater/smaller (circle the correct relationship) than the flow through tributary B. times

Explanation / Answer

Since, the radius of tributary A is 1.5 times greater than tributary B, the volume of blood flow through tributary A is 1.5 times smaller than the flow through tributary B. This is because, greater the radius, smaller is the velocity and volume of blood flow and smaller the radius, greater is the velocity and volume of blood flow. Therefore, radius of blood vessel and volume and velocity of blood flow are inversly proportional to each other.

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