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31) The atrioventricular valves permit blood flow A) in one direction only. B) in both directions. C) in many directions. D) in opposite directions on the right and left. E) None of the answers is correct.

A

34) The right ventricle pumps blood to the A) right and left lungs. B) left ventricle. C) left atrium. D) aorta. E) right atrium.

A

43) The pulmonary veins carry blood to the A) heart. B) lungs. C) brain. D) intestines. E) liver.

A

52) The ________ separate(s) the two ventricles. A) interventricular septum B) interatrial septum C) moderator band D) foramen ovale E) atrioventricular valves

A

14) The ________ lines the chambers of the heart, covers the heart valves, and is continuous with the endothelium. A) epicardium B) myocardium C) endocardium D) visceral pericardium E) parietal pericardium

C

16) The visceral pericardium is the same as the A) mediastinum. B) parietal pericardium. C) epicardium. D) myocardium. E) endocardium.

C

21) Blood is supplied to the myocardium by A) the coronary sinus. B) contact with blood in the pumping chambers. C) the coronary arteries. D) arteries that branch from the pulmonary arteries. E) None of the answers is correct.

C

25) The great and middle cardiac veins drain blood into the A) superior vena cava. B) inferior vena cava. C) coronary sinus. D) coronary sulcus. E) aorta.

C

27) Blood is supplied to the left atrium by the A) brachiocephalic artery. B) right coronary artery. C) left coronary artery. D) phrenic arteries. E) pulmonary arteries.

C

28) Coronary veins empty into the A) left atrium. B) left ventricle. C) right atrium. D) right ventricle. E) conus arteriosus.

C

3) The left border of the heart is formed by the A) left atrium and right atrium. B) right atrium and right ventricle. C) left atrium and left ventricle. D) right ventricle and left ventricle. E) None of the answers is correct.

C

30) Blood returning to the heart from the pulmonary circuit first enters the A) right atrium. B) right ventricle. C) left atrium. D) left ventricle. E) conus arteriosus.

C

33) The cusps (leaflets) of atrioventricular valves attach directly to A) papillary muscles. B) trabeculae carneae. C) chordae tendineae. D) interatrial septa. E) coronary sulci.

C

37) Blood flowing into the heart from the venae cavae flows next through the ________ valve. A) mitral B) bicuspid C) tricuspid D) pulmonary semilunar E) aortic semilunar

C

40) Compared to the right ventricle, the left ventricle has all the following characteristics except that it A) has a thicker wall. B) is round in cross section. C) pumps a greater volume. D) contracts harder. E) produces about four to six times more pressure when it contracts.

C

41) The following is a list of vessels and structures that are associated with the heart. 1. right atrium 2. left atrium 3. right ventricle 4. left ventricle 5. venae cavae 6. aorta 7. pulmonary trunk 8. pulmonary veins What is the correct order for the flow of blood entering from the systemic circulation? A) 1, 2, 7, 8, 3, 4, 6, 5 B) 1, 7, 3, 8, 2, 4, 6, 5 C) 5, 1, 3, 7, 8, 2, 4, 6 D) 5, 3, 1, 7, 8, 4, 2, 6 E) 5, 1, 3, 8, 7, 2, 4, 6

C

5) Which of the following descriptions matches the phrase "near the left fifth intercostal space"? A) pericardial cavity B) visceral pericardium C) apex of heart D) aorta E) right atrium

C

59) The ________ valve prevents backward flow into the left atrium. A) semicaval B) semilunar C) bicuspid D) tricuspid E) pulmonic

C

12) Intercalated discs serve to transfer all of the following from cell to cell except A) ionic currents. B) action potentials. C) the force of contraction. D) Z-lines. E) small molecules.

D

17) The earlike extension of the atrium is the A) ventricle. B) coronary sinus. C) coronary sulcus. D) auricle. E) atricle.

D

20) The interventricular sulci and coronary sulcus contain all of the following except A) fat. B) arteries. C) veins. D) nerves. E) None of the answers is correct.

D

35) The left ventricle pumps blood to the A) lungs. B) right ventricle. C) right atrium. D) aorta. E) pulmonary circuit.

D

36) The right atrium receives blood from all of the following except the A) coronary sinus. B) superior vena cava. C) inferior vena cava. D) pulmonary veins.

D

4) The wall(s) of the ________ rest(s) on the diaphragm. A) left atrium B) left ventricle C) right atrium D) right ventricle E) right and left ventricles

D

53) Muscular ridges on the inner surface of the ventricles are called A) fossa ovalis. B) ligamentum arteriosum. C) pectinate muscles. D) trabeculae carneae. E) None of the answers is correct.

D

56) Contractions of the papillary muscles A) close the atrioventricular valves. B) close the semilunar valves. C) eject blood from the ventricles. D) prevent the atrioventricular valves from reversing into the atria. E) eject blood from the atria into the ventricles.

D

57) The pulmonary semilunar valve prevents backward flow into the A) aorta. B) pulmonary trunk. C) pulmonary veins. D) right ventricle. E) left atrium.

D

65) Arteriosclerosis can lead to all of the following except A) hypertension. B) stroke. C) coronary artery disease. D) diabetes.

D

26) The ________ deliver(s) blood to the myocardium. A) right coronary artery B) right coronary vein C) superior vena cava D) left coronary artery E) right coronary artery and left coronary artery

E

39) The function of the atrium is to A) collect blood. B) pump blood to the lungs. C) pump blood into the systemic circuit. D) pump blood to the ventricle. E) collect blood and pump blood to the ventricle.

E

58) The bicuspid, or mitral, valve is located A) in the opening of the aorta. B) in the opening of the pulmonary trunk. C) where the venae cavae join the right atrium. D) between the right atrium and right ventricle. E) between the left atrium and left ventricle.

E

9) The cavity that contains the lungs, the heart, great vessels, thymus, esophagus, and trachea is called the A) pleural space. B) pericardial space. C) mediastinum. D) cardiac notch. E) thoracic cavity.

E

29) Blood returning to the heart from the systemic circuit first enters the A) right atrium. B) right ventricle. C) left atrium. D) left ventricle. E) conus arteriosus.

A

41) The following is a list of vessels and structures that are associated with the heart. 5. venae cavae 1. right atrium 3. right ventricle 7. pulmonary trunk

8. pulmonary veins 2. left atrium 4. left ventricle 6. aorta

1) The superior portion of the heart where major blood vessels enter and exit is the A) base. B) apex. C) inferior border. D) right border. E) left border.

A

10) The term used to describe fluid collecting in the pericardial cavity that restricts the movement of the heart is known as A) cardiac tamponade. B) mitral valve prolapse. C) pleural effusion. D) cardiomyopathy. E) pericarditis.

A

11) Most of the middle layer in the heart wall is composed of A) cardiac muscle cells. B) chondrocytes. C) epithelial cells. D) fibrocytes. E) smooth muscle cells.

A

18) The coronary sulcus is a groove that A) marks the border between the atria and ventricles. B) marks the boundary line between the right and left ventricles. C) marks the boundary line between the right and left atria. D) separates the atrioventricular valves from the atria. E) separates the coronary arteries from the coronary veins.

A

23) The marginal branch and posterior interventricular branch are branches of the A) right coronary artery. B) left coronary artery. C) circumflex artery. D) coronary sinus. E) aorta.

A

13) The muscle layer of the heart is the A) epicardium. B) myocardium. C) endocardium. D) visceral pericardium. E) parietal pericardium.

B

19) There are ________ pulmonary veins. A) 2 B) 4 C) 6 D) 8 E) 10

B

2) The inferior point of the heart is called the A) base. B) apex. C) inferior border. D) right border. E) left border.

B

22) The first blood vessels to branch from the aorta are the ________ arteries. A) pulmonary B) coronary C) circumflex D) carotid E) subclavian

B

24) The circumflex branch and the anterior interventricular artery are branches of the A) right coronary artery. B) left coronary artery. C) interventricular artery. D) coronary sinus. E) aorta.

B

38) As blood leaves the right ventricle, it passes through the ________ and then into the pulmonary trunk. A) pulmonary veins B) pulmonary valve C) aorta D) inferior vena cava E) superior vena cava

B

42) The pulmonary arteries carry blood to the A) heart. B) lungs. C) brain. D) intestines. E) liver.

B

51) The ________ separate(s) the two atria. A) interventricular septum B) interatrial septum C) moderator band D) foramen ovale E) atrioventricular valves

B

54) When the left ventricle contracts, the distance from the apex to the base A) increases. B) decreases. C) remains unchanged.

B

55) When the left ventricle contracts, the diameter of the ventricular chamber A) increases. B) decreases. C) remains the same.

B

8) The entire space between the pleural cavities containing only the heart, great vessels, thymus, trachea and esophagus is called the A) pericardial cavity. B) mediastinum. C) thoracic cavity. D) anterior cavity. E) abdominopelvic cavity.

B