BIOLOGY / Body Fluids and Circulation
QID: #11550
Which of the following correctly traces the electrical impulses that trigger each heart beat?
Choose Your Option
A. Pacemaker → AV-node → Atria → Ventricles
B. Pacemaker → Atria → AV-node → Ventricles
C. AV-node → Pacemaker → Auricles
D. Ventricle → Pacemaker → AV-node → Auricle
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