Refer to the diagram below. Which of the following represents the correct direction of the formation of the heartbeat?
A) 1, 2, 3, 4, 5, 6
B) 1, 3, 6, 2, 4, 5
C) 1, 6, 5, 4, 3, 5
D) 1, 6, 3, 2, 4, 5
E) 6, 5, 4, 3, 2, 2

Question

Refer to the diagram below. Which of the following represents the correct direction of the formation of the heartbeat? 
A) 1, 2, 3, 4, 5, 6 
B) 1, 3, 6, 2, 4, 5 
C) 1, 6, 5, 4, 3, 5 
D) 1, 6, 3, 2, 4, 5 
E) 6, 5, 4, 3, 2, 2

Quizplus · Accepted Answer

The correct direction of the formation of the heartbeat is from the sinoatrial (SA) node (1), which is the natural pacemaker, to the atrioventricular (AV) node (6), down the bundle of His (3), through the left and right bundle branches (2), and finally into the Purkinje fibers (4, 5) that spread throughout the ventricles to cause contraction. Therefore, option D is the correct representation.

Refer to the Diagram Below