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wrote...
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6 years ago
What represents the sum of all ventricular muscle cell depolarization?
 
  a. PR interval
  b. QRS complex
  c. QT interval
  d. P wave
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wrote...
6 years ago
ANS: B
The QRS complex represents the sum of all ventricular muscle cell depolarizations. The PR inter-val represents the onset of atrial activation to the onset of ventricular activity. The QT interval represents electrical systole of the ventricles. The P wave represents atrial depolarization.
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