The Right and Left Atria Depolarize and Contract Following the Arrival

question 9

Multiple Choice

The right and left atria depolarize and contract following the arrival of the action potential from the:

• A) atrioventricular (AV) node.
• B) Purkinje fibers.
• C) sinoatrial (SA) node.
• D) atrioventricular (AV) bundle.

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