Which term describes the heart's conduction system that generates rhythm and pace?

• A. Neural Control Mechanism
• B. Movement of blood
• C. Cardiac Conduction System
• D. Nervous System

Answer: (C)

The heart’s rhythm and pace come from a specialized electrical network within the heart called the cardiac conduction system. This system generates impulses that set the heartbeat and coordinate when the chambers contract. It starts in the sinoatrial node, which acts as the natural pacemaker, then sends the signal to the atrioventricular node and down the conducting pathways (bundle of His and Purkinje fibers) to activate the ventricles in a synchronized way. This term precisely names the system responsible for both rhythm and pace. It’s not neural control, which modulates rate rather than origin; nor is it a general nervous system term or the movement of blood, which are consequences or broader concepts rather than the heart’s intrinsic rhythm generator.