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Questions and Answers
What is the intrinsic rhythmical rate of the SA node?
What is the intrinsic rhythmical rate of the SA node?
- 57% of the time
- 70-80 times per minute
- 100-110 times per minute (correct)
- Purkinje fibers
What is the reason for the pulse rate averaging 70 or 80 times per minute?
What is the reason for the pulse rate averaging 70 or 80 times per minute?
- The effect of vagal tone (correct)
- The percentage of times the SA node discharges
- The presence of Purkinje fibers
- The division of the intrinsic SA node
Which of the following is responsible for distributing electrical impulses throughout the ventricles?
Which of the following is responsible for distributing electrical impulses throughout the ventricles?
- Vagal tone
- Purkinje fibers (correct)
- SA node
- Intrinsic rhythm
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