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)
Rad. L
(mm)
Rad. R
(mm)
Str. V (ml)
Rate
(strokes/min)
Press. L
(mm Hg)
Press. Dif. R
(mm Hg)
5086.8
3.0
3.0
10
508.7
40
40
5086.8
3.0
3.0
20
254.3
40
40
5086.8
3.0
3.0
30
169.6
40
40
5086.8
3.0
3.0
40
127.2
40
40
5086.8
3.0
3.0
50
101.7
40
40
5086.8
3.0
3.0
60
84.8
40
40
5086.8
3.0
3.0
80
63.6
40
40
5086.8
3.0
3.0
100
50.8
40
40
03/23/15
page 3
Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. What do you think would happen when stroke volume is decreased?
2. Why might an athlete's resting heart rate be lower than that of the average person?
3.
In this activity, which of the following stayed constant?
You correctly answered: c. flow rate
4.
Which of the following is true?
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- Spring '14
- Cardiology, heart rate
