2313

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Author:
hoalan
ID:
173975
Filename:
2313
Updated:
2012-09-27 20:37:51
Tags:
4A2
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4A2
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  1. 1. Which of the following depicts the electrical activity of the cardiac cell over time?
    a. Wiggers diagram
    b. action potential curve
    c. pressure waveforms
    d. electrocardiogram
    B
  2. 2. For the action potential curve, which of the following phases represent initial cardiac cell
    depolarization?
    a. 0 to 1
    b. 2
    c. 3
    d. 4
    A
  3. 3. For the action potential curve, which phase represents a brief period of repolarization?
    a. 0 to 1
    b. 1
    c. 2
    d. 3
    B
  4. 4. For the action potential curve, which phase represents actual cardiac contraction?
    a. 0 to 1
    b. 2
    c. 3
    d. 4
    B
  5. 5. Which ion is important in causing actual cardiac contraction?
    a. calcium
    b. potassium
    c. sodium
    d. nitrogen
    A
  6. 6. For the action potential curve, which phase represents repolarization?
    a. 0 to 1
    b. 2
    c. 3
    d. 4
    C
  7. For the action potential curve, which phase represents the resting state of the heart?
    a. 1
    b. 2
    c. 3
    d. 4
    D
  8. For the action potential curve, the period of titme where a cardiac cell will not accept a
    stimulus, no matter how strong the stimulus, is called:
    a. absolute refractory
    b. relative refractory
    c. pulse repetition
    d. isovolumic
    A
  9. For the action potential curve, the period of time where the cardiac cell can be stimulated
    only by a very strong stimulus, is called:
    a. absolute refractory
    b. relative refractory
    c. pulse repetition
    d. isovolumic
    B
  10. Which of the following statements concerning the relationship between mechanical
    electrical cardiac events is true?
    a. electrical follows mechanical
    b. mechanical precedes electrical
    c. electrical precedes mechanical
    d. electrical and mechanical occur simultaneously
    C
  11. According to the electrocardiogram, actual ventricular contraction coincides with the:
    a. P wave
    b. QRS complex
    c. ST segment
    d. T wave
    C

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