PEX 05 06
Exercise 5: Cardiovascular Dynamics: Activity 6: Studying the Effect of Stroke Volume on Pump Activity Lab Report
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. Which of the following variables directly contributes to preload?
You correctly answered: b. venous return
2. Which of the following would not increase end diastolic volume?
You correctly answered: c. dehydration
3. Increased contractility of the heart results in all but which of the following?
You correctly answered: d. increased end systolic volume
4. Which of the following does not affect stroke volume?
You correctly answered: d. All of these affect stroke volume.
5. Which of the following is not equivalent to the others?
You correctly answered: c. end diastolic volume
09/25/14
page 1
Experiment Results
Predict Question:
Predict Question: If the pump rate is analogous to the heart rate, what do you think will happen to the rate when you increase the stroke volume?
Your answer : a. The pump rate will decrease to maintain cardiac output.
Stop & Think Questions:
Why did changing the ending pump volume (ESV) automatically change the stroke volume?
You correctly answered: d. The heart intrinsically alters stroke volume to accommodate changes in preload.
The flow has stayed constant with each trial because
You correctly answered: a. cardiac output is equivalent to blood flow.
How does the heart provide for an increase in stroke volume?
You correctly answered: b. by increasing contractility
Experiment Data:
Flow
(ml/min)
5086.8
5086.8
5086.8
5086.8
5086.8
5086.8
5086.8
5086.8
Rad. L
(mm)
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
Rad. R
(mm)
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
Str. V (ml)
10
20
30
40
50
60
80
100
Rate
(strokes/min)
508.7
254.3
169.6
127.2
101.7
84.8
63.6
50.8
09/25/14
page 2
Press. L
(mm Hg)
40
40
40
40
40
40
40
40
Press. Dif. R
(mm Hg)
40
40
40
40
40
40
40
40
Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. What do you
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. Which of the following variables directly contributes to preload?
You correctly answered: b. venous return
2. Which of the following would not increase end diastolic volume?
You correctly answered: c. dehydration
3. Increased contractility of the heart results in all but which of the following?
You correctly answered: d. increased end systolic volume
4. Which of the following does not affect stroke volume?
You correctly answered: d. All of these affect stroke volume.
5. Which of the following is not equivalent to the others?
You correctly answered: c. end diastolic volume
09/25/14
page 1
Experiment Results
Predict Question:
Predict Question: If the pump rate is analogous to the heart rate, what do you think will happen to the rate when you increase the stroke volume?
Your answer : a. The pump rate will decrease to maintain cardiac output.
Stop & Think Questions:
Why did changing the ending pump volume (ESV) automatically change the stroke volume?
You correctly answered: d. The heart intrinsically alters stroke volume to accommodate changes in preload.
The flow has stayed constant with each trial because
You correctly answered: a. cardiac output is equivalent to blood flow.
How does the heart provide for an increase in stroke volume?
You correctly answered: b. by increasing contractility
Experiment Data:
Flow
(ml/min)
5086.8
5086.8
5086.8
5086.8
5086.8
5086.8
5086.8
5086.8
Rad. L
(mm)
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
Rad. R
(mm)
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
Str. V (ml)
10
20
30
40
50
60
80
100
Rate
(strokes/min)
508.7
254.3
169.6
127.2
101.7
84.8
63.6
50.8
09/25/14
page 2
Press. L
(mm Hg)
40
40
40
40
40
40
40
40
Press. Dif. R
(mm Hg)
40
40
40
40
40
40
40
40
Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. What do you