Node that sends an electrical impulse to the Bundle of His.

Node that sends an electrical impulse to the Bundle of His.

• A. Sinoatrial
• B. Purkinje fibers
• C. Bundle of His
• D. Atrioventricular

Answer: (D)

The atrioventricular node acts as the relay point between the atria and the ventricles. It receives the electrical impulse from the sinoatrial node and then passes it on to the Bundle of His. This pause at the AV node helps coordinate the timing so the atria finish contracting before the ventricles are activated. From the Bundle of His, the impulse travels down the ventricles via the left and right bundle branches and Purkinje fibers to trigger ventricular contraction. The Purkinje system and the Bundle of His are downstream of the AV node, not the source sending the impulse to the bundle itself.

The atrioventricular node acts as the relay point between the atria and the ventricles. It receives the electrical impulse from the sinoatrial node and then passes it on to the Bundle of His. This pause at the AV node helps coordinate the timing so the atria finish contracting before the ventricles are activated. From the Bundle of His, the impulse travels down the ventricles via the left and right bundle branches and Purkinje fibers to trigger ventricular contraction. The Purkinje system and the Bundle of His are downstream of the AV node, not the source sending the impulse to the bundle itself.