Put in correct order the sequence in which excitation would move through the conducting system of the heart: 1.Purkinje fibers 4. SA node
2)AV bundle 5. bundle branches
3)AV node

Question

Quizplus · Accepted Answer

The normal conduction pathway of the heart begins with the SA (sinus) node located in the right atrium. It initiates the electrical impulses that cause atrial contraction. The impulse then passes through the AV (atrioventricular) node located in the interatrial septum to the bundle of His, which divides into left and right bundle branches. The bundle branches then distribute the impulse throughout the ventricles via the Purkinje fibers, causing ventricular contraction. Therefore, the correct sequence is SA node (4), AV node (3), AV bundle (2), bundle branches (5), and Purkinje fibers (1).

Put in Correct Order the Sequence in Which Excitation Would