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Chapter 13 - Cardiovascular System
Cardiovascular System
Multiple Choice Questions
1. The tissue that forms a loose-fitting sac around the heart is the
A. Pericardium
B. Epicardium
C. Endocardium
2. Which of the following represents the correct sequence of parts through which blood
moves in passing from the vena cava to the lungs?
A. Right atrium, pulmonary semilunar valve, right ventricle, tricuspid valve
B. Right atrium, tricuspid valve, right ventricle, pulmonary semilunar valve
C. Tricuspid valve, right atrium, pulmonary semilunar valve, right ventricle
D. Pulmonary semilunar valve, right atrium, tricuspid valve, right ventricle
3. The skeleton of the heart consists of
A. Bone within the myocardium
B. Fibrous connective tissue in the interventricular septum
C. Fibrous connective tissue encircling the heart valves
D. Both B and C are true
4. When the ventricular walls contract, the
A. Bicuspid valve opens and the tricuspid valve closes
B. Tricuspid valve opens and the bicuspid valve closes
C. Bicuspid and tricuspid valves close
D. Bicuspid and tricuspid valves open
5. The pain associated with the condition called angina pectoris usually is caused by an
obstruction in an artery that supplies the
A. Left arm and shoulder
B. Neck and jaw
C. Heart
D. Sternum
6. Which of the following structures consists of self-exciting tissue?
A. Chordae tendineae
B. Papillary muscles
C. Sinoatrial node
D. Atrial syncytium
7. The correct sequence of parts that function to carry cardiac impulses is
A. A-V node, S-A node, Purkinje fibers, A-V bundle
B. A-V node, A-V bundle, Purkinje fibers, S-A node
C. S-A node, Purkinje fibers, A-V node, A-V bundle
D. S-A node, A-V node, A-V bundle, Purkinje fibers
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Chapter 13 - Cardiovascular System
8. Impulses carried to the heart by means of fibers that secrete acetylcholine are
A. Parasympathetic impulses and cause the heart rate to increase
B. Parasympathetic impulses and cause the heart rate to decrease
C. Sympathetic impulses and cause the heart rate to increase
D. Sympathetic impulses and cause the heart rate to decrease
9. The blood pressure in the systemic arteries is greatest during
A. Atrial systole
B. Ventricular systole
C. Ventricular diastole
D. Arterial diastole
10. In an ECG pattern, the P wave is caused by
A. Polarization of the atrial muscle fibers
B. Polarization of the ventricular muscle fibers
C. Depolarization of atrial muscle fibers
D. Depolarization of ventricular muscle fibers
11. In an ECG pattern, the T wave is caused by
A. Polarization of atrial muscle fibers
B. Polarization of ventricular muscle fibers
C. Depolarization of atrial muscle fibers
D. Depolarization of ventricular muscle fibers
12. In an ECG pattern, the P-Q interval indicates how long it takes for the cardiac impulse
to travel from the
A. S-A node to the atrial muscle fibers
B. S-A node to the ventricular muscular fibers
C. A-V node to the atrial muscle fibers
D. A-V node to the ventricular muscle fibers
13. The term used to describe an abnormally slow heart rate is
A. Tachycardia
B. Bradycardia
C. Fibrillation
D. Cardioversion
14. Which of the following would produce the most life-threatening condition?
A. Atrial flutter
B. Ventricular flutter
C. Atrial fibrillation
D. Ventricular fibrillation
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Chapter 13 - Cardiovascular System
15. Which of the following might serve as a secondary pacemaker for the heart?
A. A-V node
B. Purkinje fibers
C. Both A-V node and Purkinje fibers
D. Neither A-V node nor Purkinje fibers
16. Which type of blood vessel serves as a blood reservoir?
A. Artery
B. Arteriole
C. Capillary
D. Vein
17. Plasma proteins that remain in the blood capillaries help to
A. Maintain the osmotic pressure of the blood
B. Decrease the osmotic pressure of the blood
C. Maintain the hydrostatic pressure of the blood
D. Decrease the hydrostatic pressure of the blood
18. The density of capillaries within a tissue varies directly with the tissue's
A. Thickness
B. Fluid content
C. Type of matrix
D. Rate of metabolism
19. Starling's law of the heart holds that the
A. Greater the length of myocardial fibers, the greater the force with which they
contract
B. Lesser the length of myocardial fibers, the greater the force with which they
contract
C. Lesser the blood volume, the greater the force of ventricular contraction
D. Lesser the blood viscosity, the lesser the force of ventricular contraction
20. Which of the following is not a factor that seems to increase the susceptibility to
atherosclerosis?
A. Diet high in unsaturated fats
B. High blood pressure
C. Lack of physical exercise
D. Obesity
21. Blood from the face and scalp is drained by the
A. External jugular vein
B. Subclavian vein
C. Inferior vena cava
D. Cephalic vein
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Chapter 13 - Cardiovascular System
22. Which of the following is not a branch of the aorta?
A. Right coronary artery
B. Pulmonary artery
C. Brachiocephalic artery
D. Left subclavian artery
Fill in the Blank Questions
23. The ___________ is the potential space between the parietal and visceral pericardial
membranes.
24. Blood is supplied to the myocardium by means of the __________ arteries.
25. The __________ drains blood from the wall of the heart into the right atrium.
26. When the left ventricle contracts, blood passes into the ______.
27. 30. The blood vessels whose walls are thin enough to allow exchange of gases
between the blood and tissue fluid are _____________.
28. 21. A mass of interconnected cardiac muscle cells that act as a unit constitutes a(an)
_______________.
29. The T wave of an ECG pattern represents the repolarization of the ______________.
30. The aorta is the largest artery within the ____________ circuit.
31. The descending aorta divides near the brim of the pelvis to form the right and left
_________.
32. The __________ vein is the longest vein in the body.
33.
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Chapter 13 - Cardiovascular System
True / False Question
34. The SA node relays nerve impulses into the AV bundle of the interventricular septum
and the AV node is responsible for the rhythmic contractions of the heart.
35. Molecules within the blood are forced out through the walls of capillaries as a result of
osmotic pressure.
36. Arteries are strong, elastic vessels that carry blood to the heart.
37. Venules continue from capillaries to form veins, which carry blood back to the atria.
38. Veins function as blood reservoirs whenever blood pressure increases by venous walls
constricting.
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