Increasing the flow tube length is analogous to

1. Increasing the flow tube length is analogous to increasing blood vessel length. How did this affect the flow rate?
2. Which of the following correctly describes the relationships between blood vessel length, resistance, and blood flow?
You correctly answered: c. Blood vessel length is directly proportional to resistance and inversely proportional to blood flow.
3. Which of the following correctly describes the relationships between blood vessel radius, resistance, and blood flow?
You correctly answered: d. Blood vessel radius is inversely proportional to resistance and directly proportional to blood flow.
4. Which of the following describes why the body might require an increase in vessel radius?
You correctly answered: a. to provide more blood flow and, therefore, nutrients to a particular body part

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Review Sheet Results
1. Which is more likely to occur, a change in blood vessel radius or a change in blood vessel length? Explain why.
Your answer:
2. Explain the effect that the change in blood vessel length had on flow rate. How well did the results compare with your
prediction?
3. Explain why you think blood vessel radius can have a larger effect on the body than changes in blood vessel length (use
the blood flow equation).
Your answer:
4. Describe the effect that obesity would have on blood flow and why.
Your answer:
Obesity would decrease blood flow because as blood vessel length increases when we gain weight.

Name: Kiara Thompson
Exercise 5: Cardiovascular Dynamics: Activity 4: Studying the Effect of Blood Pressure on Blood Flow Rate Lab Report
Pre-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. Pressure changes in the cardiovascular system primarily result from
You correctly answered: b. changes in the force of contraction of the heart.
2. What is the driving force for blood flow?
3. Which of the following is directly proportional to blood flow?
You correctly answered: e. blood vessel radius and pressure gradient
4. Arteries close to the heart need to be able to compensate for
You correctly answered: c. pressure changes.
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Experiment Results
Predict Question:
Predict Question 1: What effect do you think increasing the pressure will have on the fluid flow rate?
Your answer : b. The fluid flow rate will increase.
Predict Question 2: 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 : b. no
Stop & Think Questions:
This experiment uses pressure changes to model
You correctly answered: c. changes in the force of contraction of the heart.