Which event occurs first in the normal cardiac conduction sequence?
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Correct answer: Impulse generation in SA node
The sequence begins with impulse generation in the SA node. This initiates the heartbeat and subsequent conduction events.
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More Cardiac Conduction System (SA, AV Nodes) questions
- Damage to the AV node would most directly affect:
- Which structure prevents simultaneous contraction of atria and ventricles?
- The rate of impulse generation in the SA node is normally about:
- 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?