Biomed 107 Practice Quiz
Chapters 22-23, Spring 2007
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  1. The _?_ carry _?_ blood from the heart to the lungs.
    1. systemic veins / deoxygenated
    2. pulmonary veins / deoxygenated
    3. pulmonary arteries / deoxygenated
      4.
    4. pulmonary veins / oxygenated
    5. pulmonary arteries / oxygenated

  2. What are the three layers of the heart wall, in order from external to internal?
    1. pericardium, myocardium, epicardium
    2. myocardium, endocardium, epicardium
    3. epicardium, myocardium, endocardium
      4.
    4. endocardium, myocardium, pericardium

  3. The _?_ is the same as the visceral layer of the serous pericardium.
    1. epicardium
      2.
    2. endocardium
    3. tunica interna
    4. visceral pleura of the mediastinal lung surfaces

  4. In cardiac muscle tissue, the fibers are...
    1. unbranched
    2. arranged in spiral bundles
    3. connected to each other by intercalated discs
    4. both A. and C.
    5. both B. and C.
      6.

  5. Which one of the following is normally the least electrically conductive?
    1. Purkinje fibers
    2. atrial myocardium
    3. ventricular myocardium
    4. atrioventricular bundle
    5. fibrous skeleton of heart
      6.

  6. For the most part, cardiac muscle fibers and heart valves are attached to...
    1. the fibrous pericardium
    2. the fibrous skeleton of the heart
      3.
    3. the atrioventricular node
    4. the atrioventricular bundle

  7. The heart is rotated such that the _?_ are slightly anterior to the other chambers.
    1. right and left atria
    2. right and left ventricles
    3. right atrium and right ventricle
      4.
    4. left atrium and left ventricle

  8. Which statement is not true of the left ventricle?
    1. its wall is almost identical in thickness to that of the right ventricle
      2.
    2. its wall includes papillary muscles
    3. blood can exit the left ventricle only when the aortic semilunar valve is open
    4. blood can enter the left ventricle only when the bicuspid valve is open

  9. Blood returning from the lungs passes through _?_ to the _?_.
    1. pulmonary veins / right atrium
    2. pulmonary veins / left atrium
      3.
    3. pulmonary arteries / right atrium
    4. pulmonary arteries / left atrium
    5. coronary arteries / pulmonary veins

  10. Which valve ensures unidirectional flow of blood between the right atrium and the right ventricle?
    1. bicuspid valve
    2. tricuspid valve
      3.
    3. pulmonary semilunar valve
    4. aortic semilunar valve
    5. none of the above (no valve is required to ensure unidirectional flow between the right atrium and the right ventricle)

  11. The papillary muscles prevent the _?_ from everting into the _?_.
    1. semilunar valves / atria
    2. semilunar valves / ventricles
    3. atrioventricular valves / atria
      4.
    4. atrioventricular valves / ventricles

  12. The primary function of the cardiac conduction system is to carry _?_ to the myocardium.
    1. oxygenated blood
    2. externally generated (autonomic) nerve signals
    3. both of the above
    4. none of the above
      5.

  13. The sinoatrial node...
    1. is located in the apex of the heart.
    2. functions as the natural "pacemaker" of the heart.
      3.
    3. releases signals that spread directly through the ventricular myocardium.
    4. both A. and B.
    5. both B. and C.

  14. Prior to birth, the foramen ovale allows blood to flow...
    1. from the right atrium to the left atrium
      2.
    2. from the right atrium to the left ventricle
    3. from the right ventricle to the left ventricle
    4. from the left atrium to the right ventricle
    5. from the pulmonary trunk to the aorta

  15. Normally, the left ventricle...
    1. pumps more blood per minute than does the right ventricle
    2. generates higher systolic pressure than does the right ventricle
      3.
    3. completes more cardiac cycles per minute than does the right ventricle
    4. all of the above
    5. none of the above

  16. In the systemic circulation...
    1. the arteries carry blood under higher pressure than do veins in the systemic circulation.
    2. the arteries carry blood under higher pressure than do arteries in the pulmonary circulation.
    3. the arteries carry more highly oxygenated blood than do arteries in the pulmonary circulation.
    4. all of the above
      5.
    5. none of the above

  17. It is normal for the _?_ to glide and rub against each other as the heart beats.
    1. myocardium and endocardium
    2. visceral layer of serous pericardium and myocardium
    3. parietal and visceral layers of serous pericardium
      4.
    4. fibrous pericardium and parietal layer of serous pericardium
    5. none of the above

  18. The coronary sinus carries _?_ to the _?_.
    1. oxygenated blood / walls of the ventricles
    2. oxygenated blood / walls of all heart chambers
    3. deoxygenated blood / right atrium
      4.
    4. deoxygenated blood / right and left coronary arteries
    5. deoxygenated blood / great cardiac vein and middle cardiac vein

  19. The _?_ are both located mainly located in the interventricular septum.
    1. bundle branches and Purkinje fibers
    2. sinoatrial node and Purkinje fibers
    3. sinoatrial node and atrioventricular node
    4. atrioventricular node and Purkinje fibers
    5. atrioventricular bundle and bundle branches
      6.

  20. Sympathetic innervation of the heart originates in...
    1. the vagus nerve
    2. sinoatrial node
    3. atrioventricular node
    4. spinal segments T1-T5
      5.

  21. In arteries, the _?_ is the layer closest to the lumen and the _?_ is the layer farthest from the lumen.
    1. tunica media / tunica intima
    2. tunica media / tunica adventitia
    3. tunica intima / tunica media
    4. tunica intima / tunica adventitia
      5.
    5. tunica adventitia / tunica media

  22. The most elastic of the blood vessels are the...
    1. large arteries
      2.
    2. medium arteries and arterioles
    3. capillaries
    4. venules
    5. medium and large veins

  23. Compared to its companion artery, a vein would be likely to have...
    1. thinner walls
    2. a wider lumen
    3. both of the above
      4.
    4. none of the above

  24. Which one of the following is true?
    1. When a person is physically at rest, approximately one third of the blood volume is contained in the veins.
    2. When a person is physically at rest, pressure gradients created by breathing are an important factor causing blood flow in veins.
      3.
    3. Both of the above are true.
    4. None of the above are true.

  25. Which one of the following is the best description of the function of the ductus arteriosus?
    1. In a fetus, the ductus arteriosus receives blood from the umbilical arteries.
    2. In a fetus, the ductus arteriosus receives blood from the umbilical vein.
    3. In a fetus, the ductus arteriosus shunts blood from the pulmonary trunk to the right atrium.
    4. In a fetus, the ductus arteriosus shunts blood from the pulmonary trunk to the left atrium.
    5. In a fetus, the ductus arteriosus shunts blood from the pulmonary trunk to the aorta.
      6.