Chapter 18 The Cardiovascular System: The Heart

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Chapter 18 The Cardiovascular System: The Heart Lab exam True - False exam Matching questions
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Figure 18.1
Using Figure 18.1, match the following:
1) Purkinje fibers.

2) SA node.

3) AV bundle.

4) AV node.

5) Bundle branches.

1. Answer: E

2. Answer: A

3. Answer: C

4. Answer: B

5. Answer: D

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Figure 18.2
Using Figure 18.2, match the following:
6) Atrial depolarization.

7) Point after which pressure begins to rise in the aorta.

8) Ventricular repolarization.

9) Point that represents the "dup" sound made by the heart.

6. Answer: A

7. Answer: D

8. Answer: E

9. Answer: E

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Figure 18.3
Using Figure 18.3, match the following:

10) Ventricular fibrillation.

11) Second-degree heart block.

12) Junctional rhythm.

13) Normal sinus rhythm.

10. Answer: D

11. Answer: C

12. Answer: B

13. Answer: A


Match the following:

A) Epicardium
B) Parietal layer
C) Myocardium
D) Endocardium

14) The inner lining of the heart.

15) Heart muscle.

16) Serous layer covering the heart muscle.

17) The outermost layer of the serous pericardium.

14. D endocardium

15. C myocardium

16. A epicardium

17. B parietal layer


Match the following:

A) Purkinje fibers
B) AV bundle
C) SA node
D) AV node

18) The pacemaker of the heart.

19) Found in the interventricular septum.

20) Network found in the ventricular myocardium.

21) The point in the conduction system of the heart where the impulse is temporarily delayed.

18. C SA node

19. B AV bundle

20. A purkinje fibers

21. D AV node


Match the following:

A) Pulmonary valves
B) Aortic valve
C) Mitral valve
D) Tricuspid valve

22) Prevents backflow into the left ventricle.

23) Prevents backflow into the right atrium.

24) Prevents backflow into the left atrium.

25) Prevents backflow into the right ventricle.

26) AV valve with two flaps.

27) AV valve with three flaps.

22. B aortic valve

23. D tricuspid

24. C mitral

25. A pulmonary valves

26. C mitral valve

27. D tricuspid

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Figure 18.4

Using Figure 18.4, match the following:

28) Tricuspid valve.

29) Mitral valve.

30) Right atrium.

31) Left ventricle.

32) Pulmonary veins.

28. Answer: B

29. Answer: D

30. Answer: A

31. Answer: E

32. Answer: C


Match the following:

A) Ischemia
B) Ectopic focus
C) Quiescent period
D) Infarction
E) Fibrillation

33) Heart muscle is deprived of oxygen.

34) Death of heart muscle cells.

35) A condition of rapid and irregular or out-of-phase contraction of heart muscle cells.

36) An abnormal pacemaker.

37) Total heart relaxation.

33. Ischemia

34. Infarction

35. Fibrillation

36. Ectopic focus

37. Quiescent period


True/False Questions

1) The myocardium receives its blood supply from the coronary arteries.

Answer: TRUE


2) Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than
does skeletal muscle.

Answer: FALSE


3) Anastomoses among coronary arterial branches provide collateral routes for blood delivery to
the heart muscle.

Answer: TRUE


4) Congestive heart failure means that the pumping efficiency of the heart is depressed so that
there is inadequate delivery of blood to body tissues.

Answer: TRUE


5) Tissues damaged by myocardial infarction are replaced by connective tissue.

Answer: TRUE


6) The left side of the heart pumps the same volume of blood as the right.

Answer: TRUE


7) Chronic release of excess thyroxine can cause a sustained increase in heart rate and a
weakened heart.

Answer: TRUE


8) Arterial blood supply to heart muscle is continuous whether the heart is in systole or diastole.

Answer: FALSE


9) Trabeculae carneae are found in the ventricles and never the atria.

Answer: TRUE


10) The "lub" sounds of the heart are valuable in diagnosis because they provide information
about the function of the heart's pulmonary and aortic valves.

Answer: FALSE


11) Autonomic regulation of heart rate is via two reflex centers found in the pons.

Answer: FALSE


12) The papillary muscles contract after the other ventricular muscles so that they can take up the
slack on the chordae tendineae before the full force of ventricular contractions sends blood
against the AV valve flaps.

Answer: FALSE


13) An ECG provides direct information about valve function.

Answer: FALSE


14) As pressure in the aorta rises due to atherosclerosis, more ventricular pressure is required to
open the aortic valve.

Answer: TRUE


15) Proxysmal atrial tachycardia is characterized by bursts of atrial contractions with little pause
between them.

Answer: TRUE


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