Hall: Guyton and Hall Textbook of Medical Physiology, 12th Edition

Chapter 09: Cardiac Muscle; The Heart as a Pump and Function of the Heart Valves

Test Bank

Questions 1-3: A fifty-year-old man has a body weight of 110 kg, resting heart rate is 90 beats/minute, arterial pressure is 120/70 mmHg, arterial hematocrit is 35% and body temperature is normal. His pressure-volume diagram of the left ventricle is shown below.

1. What is his resting cardiac output inml/minute?A. 900B. 8,000C. 9,000D. 10,000E. 15,000

ANS: C

2. What event occurs at point D in the man’spressure-volume relationship?A. A-V valves closeB. Aortic valve opensC. Aortic valve closesD. A-V valves openE. Third heart sound

ANS: C

3. What is his ventricular ejection fraction?A. 33%B. 50%C. 60%D. 67%E. 80%

ANS: D

4. Which of the following will result in spastic contraction of the heart?A. Excess calcium ions in the bloodB. Excess potassium ions in the bloodC. Excess sodium ions in the bloodD. Decreased sympathetic stimulationE. Decreased norepinephrine concentration in the blood

ANS: A

Copyright © 2011, 2006 by Saunders, an imprint of Elsevier Inc.

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Test Bank

Questions 5-7: A sixty-year-old woman has a body weight of 110 kg, resting cardiac output is9,000 ml/minute, arterial pressure is 90/50 mmHg, arterial hematocrit is 25% and body temperature is normal. Her pressure-volume diagram of the left ventricle is shown below.

5. What is her resting heart rate inbeats/minute?A. 70B. 80C. 90D. 100E. 110

ANS: C

6. What event occurs at point A in thewoman’s pressure-volume relationship?A. A-V valves closeB. Aortic valve opensC. Aortic valve closesD. A-V valves openE. Third heart sound

ANS: D

7. If the woman is given a 500 ml whole blood transfusion over a 15 minute period, her ventricular preload will increase. One minute after the transfusion is complete, what will the new stroke volume be assuming her heart is normal?A. 70 mlB. 80 mlC. 90 mlD. 100 mlE. 120 ml

ANS: A

Questions 8-9: A fifty-year-old man has a body weight of 110 kg, resting heart rate is 90 beats/minute, arterial pressure is 120/70mmHg, arterial hematocrit is 35% and bodytemperature is normal. His pressure-volumediagram of the left ventricle is shown below.

8. When does the third heart sound occur inthe ventricular pressure-volumerelationship?A. At point DB. Between point A and point B

Copyright © 2011, 2006 by Saunders, an imprint of Elsevier Inc.

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CD

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Test Bank

C. Between point B and point CD. Between point C and point DE. Between point D and point A

ANS: B

9. When does the second heart sound occur in the ventricular pressure-volume relationship?A. At point DB. Between point A and point BC. Between point B and point CD. Between point C and point DE. Between point D and point A

ANS: A

Copyright © 2011, 2006 by Saunders, an imprint of Elsevier Inc.

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