The rate of impulse generation in the SA node is normally about:
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Correct answer: About 60–80 beats per minute
The SA node typically generates impulses 60–80 times per minute in resting adults. This determines the normal resting heart rate, sometimes called sinus rhythm.
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More Cardiac Conduction System (SA, AV Nodes) questions
- Which ion plays a major role in spontaneous depolarization of SA node cells?
- The conducting fibers with the fastest impulse transmission speed are:
- Which statement correctly describes cardiac conduction?
- Complete heart block is most likely due to failure of conduction at the:
- Which structure acts as the primary pacemaker of the human heart?
- The SA node is located in which part of the heart?