Which structure ensures that impulses reach the apex of the heart first?
Show answer and explanation
Correct answer: Purkinje fibers
Purkinje fibers extend to the apex of the ventricles. This ensures contraction starts at the apex and moves upward efficiently.
Practice all 20 Cardiac Conduction System (SA, AV Nodes) questions
Keep practicing
More Cardiac Conduction System (SA, AV Nodes) questions
- Bundle branches are located in the:
- Which event occurs first in the normal cardiac conduction sequence?
- 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?