Contrasting blood pressure gradients

 

1) The same kind of blood flows through two very long identical blood vessels. Each vessel has the same diameter. A scientist measures the pressure of the blood near the beginning and near the end of each blood vessel.

 

Which blood vessel has the greatest flow rate (L/min) of blood?

a) Blood vessel 1

b) Blood vessel 2

c) They will have the same rate of flow

 

Explain the reasoning for your choice about which blood vessel has the greatest flow rate.

 

 

2) Now let's look at another set of tubes. The same kind of blood flows through two very long identical blood vessels. Each vessel has the same diameter.  A scientist measures the pressure of the blood near the beginning and near the end of each blood vessel. Both of these tubes have the same pressure difference but different starting and ending pressures.

Which blood vessel has the greatest flow rate (L/min) of blood?

a) Blood vessel 1

b) Blood vessel 2

c) They will have the same rate of flow

 

Explain the reasoning for your choice about which blood vessel has the greatest flow rate.

 

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This material is based upon work supported by the National Science Foundation (DUE grants: 1438739, 1323162, 1347740, 0736952 and 1022653). Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the NSF.