Do you think a graph plotted with pressure on the x

Do you think a graph plotted with pressure on the X-axis and flow rate on the Y-axis will be linear (a
straight line)?
Your answer : a. yes
Stop & Think Questions:
This experiment uses pressure changes to model
You correctly answered: c. changes in the force of contraction of the heart.
Experiment Data:
Flow (ml/min) Radius (mm) Viscosity Length (mm) Pressure (mm Hg)
35.0 5.0 3.5 50 25
70.1 5.0 3.5 50 50
105.1 5.0 3.5 50 75
140.2 5.0 3.5 50 100
175.2 5.0 3.5 50 125
210.3 5.0 3.5 50 150
245.3 5.0 3.5 50 175
280.4 5.0 3.5 50 200

03/07/17 page 3
Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. The effect of increasing pressure was to
You correctly answered: b. increase flow rate.
2. Blood pressure is measured in
You correctly answered: c. mm Hg.
3. Which of the following variables has the greatest effect on blood flow?
You correctly answered: d. vessel radius
4. Blood flow is measured in
You correctly answered: a. ml/min.

03/07/17 page 4
Review Sheet Results
1. Explain the effect that pressure changes had on flow rate. How well did the results compare with your prediction?
2. How does the plot differ from the plots for tube radius, viscosity, and tube length? How well did the results compare with
your prediction?
3. Explain why pressure changes are not the best way to control blood flow.
You did not answer this question.
4. Use your data to calculate the increase in flow rate in ml/min/mm Hg.
You did not answer this question.