A nurse uses a picture to demonstrate the conduction pathway through the chambers of the heart. (Arrange the following options in the correct sequence. Separate letters by a comma and space as follows: A, B, C, D.)
A. The atria contract.
B. Conduction occurs through the bundle branches.
C. The AV node fires.
D. The Purkinje fibers conduct.
E. The SA node fires.
F. The ventricles contract.
E, A, C, B, D, F
The conduction pathway begins in the SA node, travels down the atrial wall, depolarizing the atria, to the AV node, bundle branches, and Purkinje fibers, contracting the ventricles.
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