Electrical Conduction System Flashcard

Front

What is the sinoatrial node?

Back

The sinoatrial node (SA node) is a group of cells located in the right atrium of the heart that acts as the natural pacemaker, initiating electrical impulses that regulate the heartbeat.

Front

Where is the sinoatrial node located?

Back

The sinoatrial node is located in the right atrium of the heart.

Front

What is the primary function of the sinoatrial node?

Back

The primary function of the sinoatrial node is to act as a pacemaker, generating electrical impulses that control the heart's rhythm.

Front

What does the term 'pacemaker' refer to in the context of the heart?

Back

In the context of the heart, a 'pacemaker' refers to a group of cells that generate electrical impulses to regulate the heartbeat.

Front

What is the role of the atrioventricular node?

Back

The atrioventricular node (AV node) receives electrical impulses from the sinoatrial node and transmits them to the ventricles, coordinating the timing of heart contractions.

Front

What are Purkinje fibers?

Back

Purkinje fibers are specialized conductive fibers in the heart that distribute electrical impulses to the ventricular muscle, facilitating coordinated contraction.

Front

How does the electrical conduction system of the heart function?

Back

The electrical conduction system of the heart functions by generating and transmitting electrical impulses that stimulate heart muscle contractions, ensuring proper blood flow.

Front

What happens if the sinoatrial node fails?

Back

If the sinoatrial node fails, other pacemaker cells in the heart may take over, but the heart rate may be slower and less efficient.

Front

What is the significance of the heart's electrical conduction system?

Back

The heart's electrical conduction system is crucial for maintaining a regular heartbeat and ensuring that the heart pumps blood effectively throughout the body.

Front

What is the relationship between the sinoatrial node and heart rate?

Back

The sinoatrial node directly influences heart rate by determining the frequency of electrical impulses that initiate heartbeats.