mdcat logical reasoning MCQ #799

A person's heart rate increases from 60 to 120 beats per minute. What is the likely effect on the electrical conduction system of the heart?

mdcat logical reasoning MCQ #799

  1. Question 1

    Q1. A person's heart rate increases from 60 to 120 beats per minute. What is the likely effect on the electrical conduction system of the heart?

    • A) Increased atrial depolarization
    • B) Decreased ventricular repolarization
    • C) Increased sinoatrial node depolarization
    • D) Decreased atrioventricular node conduction

    Answer: Increased sinoatrial node depolarization

    Explanation: Increased heart rate results in faster sinoatrial node depolarization, leading to increased heart rate.