Biomed 100 Practice Quiz
Chapter 13, Spring 2007
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Multiple Choice - One Correct Choice Per Question
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  1. Which one of the following is the thickest?
    1. myocardium of right atrium
    2. myocardium of left atrium
    3. myocardium of right ventricle
    4. myocardium of left ventricle
      5.

  2. Purkinje fibers are...
    1. located in the ventricular myocardium
    2. involved in blood flow through the myocardium
    3. involved in electrical stimulation of the myocardium
    4. both A. and B.
    5. both A. and C.
      6.

  3. Normally, systole in the left ventricle coincides with...
    1. systole in the left atrium
    2. systole in the right ventricle
      3.
    3. diastole in the right ventricle
    4. both A. and B.
    5. both A. and C.

  4. The ventricles receive blood...
    1. directly from veins
    2. directly from atria
      3.
    3. during ventricular systole
    4. both A. and C.
    5. both B. and C.

  5. Which statement best describes the cause of the two major heart sounds?
    1. shock waves resulting from discharge of the sinoatrial node followed by discharge of the atrioventricular node
    2. contraction of the atria followed by contraction of the ventricles
    3. contraction of the right ventricle followed by contraction of the left ventricle
    4. turbulence resulting from opening of the atrioventricular valves followed by opening of the semilunar valves
    5. shock waves resulting from closing of the atrioventricular valves followed by closing of the semilunar valves
      6.

  6. The cells that normally initiate each cardiac cycle are located in the...
    1. coronary arteries
    2. coronary sinus
    3. sinoatrial node
      4.
    4. atrioventricular node

  7. Proper electrical stimulation of the ventricles requires the normal function of the...
    1. atrioventricular node
    2. atrioventricular bundle (bundle of His) and bundle branches
    3. all of the above
      4.
    4. none of the above

  8. True or false? The general term for the type of vessel that carries oxygenated blood toward vital organs such as the brain is "pulmonary artery."
    1. True.
    2. False.
      3.

  9. "Systolic pressure" generally refers to...
    1. the average pressure in an artery during the entire cardiac cycle.
    2. the maximum pressure in an artery, occurring during ventricular contraction.
      3.
    3. the "extra" pressure in an artery when the ventricles go from relaxed to contracted.
    4. the "lost" pressure in an artery when the ventricles go from contracted to relaxed.

  10. The "skeleton" of the heart, to which the heart valves and other structures are connected, is composed of...
    1. myocardium
    2. branches of the coronary arteries
    3. dense, fibrous, connective tissue
      4.
    4. bundle branches and Purkinje fibers

  11. Blood is supplied to the myocardium by the _?_, which are branches of the _?_.
    1. coronary arteries / aorta
      2.
    2. coronary arteries / pulmonary trunk
    3. pulmonary arteries / pulmonary trunk
    4. right and left bundle branches / atrioventricular bundle

  12. Given the following key:
    1 = arteries
    2 = veins
    3 = capillaries
    Which one of the following is in the correct sequence according to the blood pressure in the vessels, from highest to lowest?
    1. 1 > 2 > 3
    2. 1 > 3 > 2
      3.
    3. 2 > 1 > 3
    4. 2 > 3 > 1
    5. 3 > 1 > 2

  13. Which one of the following is false?
    1. The left side of the heart contains oxygenated blood.
    2. Blood in the “right heart” do not normally mix with blood in the “left heart.”
    3. All arteries carry oxygenated blood.
      4.
    4. The "skeleton" of the heart does not conduct electricity.

  14. Which heart chambers spend more time in systole than in diastole?
    1. The atria.
    2. The ventricles.
    3. All heart chambers spend more time in systole than in diastole.
    4. No heart chambers spend more time in systole than in diastole.
      5.