Which of the Following Statements Are True of the Cardiac

Which of the following statements are true of the cardiac conduction pathway (Select all that apply) ?

A) The electrical events along the pathway are triggered by the mechanical events of the chambers.
B) The AV node depolarizes most rapidly.
C) The heart's natural pacemaker is the SA node.
D) The right and left bundle branches are in the interatrial septum.
E) Purkinje fibers are in the walls of the ventricles.
F) The AV bundle (of His) has a slower natural rate of contraction than does the AV node.