How does the heart provide for an increase in stroke volume You correctly

How does the heart provide for an increase in stroke

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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
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11/13/17 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? You correctly answered: d. ESV = EDV - SV
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11/13/17 page 4 Review Sheet Results 1. Describe the Frank-Starling law in the heart.Your answer: 2. Explain what happened to the pump rate when you increased the stroke volume? Why do you think this occurred? Howwell did the results compare with your prediction? 3. Describe how the heart alters stroke volume.Your answer: 4. Describe the intrinsic factors that control stroke volume.Your answer:
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1. Which of the following could cause an increase in peripheral resistance in the blood vessel? You correctly answered: b. atherosclerosis 2. Which structures in the heart ensure that one-way flow occurs? 3. Which of the following might be seen in both the diseased heart and the athlete's heart? You correctly answered: c. thicker myocardium 4. The type of resistance increased in aortic valve stenosis is You correctly answered: d. increased left-ventricular afterload. 11/13/17 page 1
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11/13/17 page 2 Experiment Results Predict Question: Predict Question 1: You will now test three mechanisms to compensate for the decrease in flow rate caused by the decreased flow tube radius. Which mechanism do you think will have the greatest compensatory effect? Your answer : b. increasing the pump's pressure Predict Question 2: What do you think will happen if the pump pressure and the beaker pressure are the same? Your answer : c. Flow will stop. Stop & Think Questions: Narrowing of the right flow tube radius simulates You correctly answered: c. aortic valve stenosis.
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