Blood and Fluid Flow Rate

Name: Ashlei Sickles
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?
You correctly answered: d. pressure gradient
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.

05/23/13

page 1

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 : 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)
35.0
70.1
105.1
140.2
175.2
210.3
245.3
280.4

Radius (mm)
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0

Viscosity
3.5
3.5
3.5
3.5
3.5
3.5
3.5
3.5

05/23/13

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

page 2

Pressure (mm Hg)
25
50
75
100
125
150
175
200

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.