Trace the impulse pattern of conduction in sequence through the heart. (Separate letters by a comma and space as follows: A, B, C, D)
a. Atrial wall
b. Atrial-ventricular (AV) node
c. Purkinje fibers
d. Sinoatrial (SA) node
e. Bundle branches
f. Bundle of His
B, A, D, F, E, C
The conduction begins with the impulse from the SA node that travels down the atrial wall to the AV node, to the Bundle of His, to the bundle branches, and finally to the Purkinje fibers.
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a. stage I c. stage III b. stage II d. stage IV
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