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Pex-05-01

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Submitted By sstevens92
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Name: Suzzanna Stevens
Exercise 5: Cardiovascular Dynamics: Activity 1: Studying the Effect of Blood Vessel Radius on Blood Flow Rate Lab Report
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. Blood flow is measured in
You correctly answered: b. ml/min.
2. Which of the following has the greatest effect on blood flow?
You correctly answered: a. blood vessel radius
3. Which of the following would not result in a decrease in the blood vessel radius?
You correctly answered: c. vasodilation
4. The diameter of the blood vessel is the same as
You correctly answered: b. two times the radius of the blood vessel.
5. The opening of the blood vessel where the blood flows is called the
You correctly answered: b. lumen.

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page 1

Experiment Results
Predict Question:
Predict Question 1: What do you think will happen to the flow rate if the radius is increased by 0.5 mm?
Your answer : b. The flow rate will increase.
Predict Question 2: Do you think a graph plotted with radius on the X-axis and flow rate on the Y-axis will be linear (a straight line)?
Your answer : b. no
Stop & Think Questions:
What is the driving force for blood flow?
You correctly answered: b. pressure gradient
How does the body increase the blood vessel radius?
You correctly answered: c. smooth muscle relaxation
Experiment Data:
Flow (ml/min)
4.0
12.6
30.7
63.6
117.8
201.0
321.9
490.6

Radius (mm)
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0

Viscosity
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0

03/30/16

Length (mm)
50
50
50
50
50
50
50
50

page 2

Pressure (mm Hg)
100
100
100
100
100
100
100
100

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page 3

Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. The variable that you altered in this activity was
You correctly answered: c. vessel radius.
2.

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