PhysioEx Lab Report Cardiovascular Dynamics

PhysioEx Lab Report
Exercise 5: Cardiovascular Dynamics
Activity 2: Studying the Effect of Blood Viscosity on Blood Flow Rate
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
Experiment Results
Predict Question
Stop & Think Questions
Which of the following is not a formed element?
You correctly answered: plasma protein.
1
Thrombocytopenia is a reduction in platelets. What effect do you think this could have on
blood viscosity?
You correctly answered: decrease blood viscosity.
2
Which of the following does not contribute to the viscosity of the blood?
You correctly answered: oxygen level in the blood.
3
Viscosity most directly affects
You correctly answered: peripheral resistance.
4
Predict Question: What effect do you think increasing the viscosity will have on the fluid flow
rate?


Your answer: The fluid flow rate will decrease.
1
What is the relationship between fluid flow and viscosity?
You correctly answered: They are inversely proportional to each other.
1
What effect do you think aplastic anemia (reduced red blood cells) would have on blood
flow?
You correctly answered: increased blood flow due to decreased viscosity.
2

11/23/2019 PhysioEx Exercise 5 Activity 2
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act2/# 2/3
Experiment Data
Flow (ml/min) Radius (mm) Viscosity Length (mm) Pressure (mm
Hg)
490.6 5.0 1.0 50 100
245.3 5.0 2.0 50 100
163.5 5.0 3.0 50 100
122.7 5.0 4.0 50 100
98.1 5.0 5.0 50 100
81.8 5.0 6.0 50 100
70.1 5.0 7.0 50 100
61.3 5.0 8.0 50 100
Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
The variable that you altered in this activity was
You correctly answered: viscosity.
1
Increasing viscosity resulted in
You correctly answered: decreased flow rate.
2
What effect would a decreased hematocrit have on blood flow?
You correctly answered: decreased viscosity, increased flow.
3
4 What do you predict would be the overall affect on viscosity during dehydration?

11/23/2019 PhysioEx Exercise 5 Activity 2
https://media.pearsoncmg.com/bc/bc_0media_ap/physioex/10/ex5/act2/# 3/3
Review Sheet Results
You correctly answered: increased viscosity, decreased flow.
Describe the components in the blood that affect viscosity.
Your answer:
Plasma proteins, white blood cells, red blood cells, and platelets affect viscosity in the blood.
1
Explain the effect that the viscosity change had on flow rate. How well did the results
compare with your prediction?
Your answer:
As predicted, increasing the viscosity, or thickness of the fluid will decrease the flow rate due
to the density increase.
2
Describe the graph of flow versus viscosity.
Your answer:
The graph of flow versus viscosity are inverse proportional.
3
Discuss the effect that polycythemia would have on viscosity and on blood flow.
Your answer:
The effect of polycythemia would proceed in an increase in viscosity and a decrease in blood
flow

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