MDCAT Biology MCQ #2112

Which part of the heart's conduction system is responsible for delaying the impulse?

MDCAT Biology MCQ #2112

  1. Question 1

    Q1. Which part of the heart's conduction system is responsible for delaying the impulse?

    • A) SA node
    • B) AV node
    • C) Bundle of His
    • D) Purkinje fibers

    Answer: AV node

    Explanation: The AV node delays the impulse, allowing the atria to fully contract before ventricular contraction begins.