Cardiac Conduction System Quiz

Which component of the cardiac conduction system is known as the natural pacemaker of the heart?

• Sinoatrial node

• Atrioventricular node

• AV bundle

• Purkinje fibers

Where is the sinoatrial node located?

• Right atrium near the entrance of the superior vena cava

• Left atrium near the entrance of the pulmonary veins

• Right ventricle near the entrance of the pulmonary artery

• Left ventricle near the entrance of the aorta

What is the function of the atrioventricular node?

• To initiate all heartbeats

• To delay the passage of electrical impulses to the ventricles

• To conduct electrical impulses toward the apex of the heart

• To spread electrical impulses throughout both atria

Which component of the cardiac conduction system conducts the electrical impulses toward the apex of the heart?

• Sinoatrial node

• Atrioventricular node

• Bundle of HIS

• Purkinje fibers

What does the P wave on an electrocardiogram (ECG) represent?

• Atrial contraction

• Ventricular depolarization

• Ventricular repolarization

• Atrial repolarization

What does the QRS complex on an electrocardiogram (ECG) represent?

• Atrial contraction

• Ventricular depolarization

• Ventricular repolarization

• Atrial repolarization

What does the T wave on an electrocardiogram (ECG) represent?

• Atrial contraction

• Ventricular depolarization

• Ventricular repolarization

• Atrial repolarization

What is the purpose of the delay in the atrioventricular node?

• To ensure the atria have ejected all the blood into the ventricles before the ventricles contract

• To initiate all heartbeats

• To conduct electrical impulses toward the apex of the heart

• To spread electrical impulses throughout both atria

What is the purpose of the Bundle of His?

• To initiate all heartbeats

• To delay the passage of electrical impulses to the ventricles

• To conduct electrical impulses toward the apex of the heart

• To spread electrical impulses throughout both atria

What is the purpose of recording an electrocardiogram (ECG)?

• To measure blood pressure

• To visualize the heart's structure

• To monitor the electrical activities of the heart

• To assess heart valve function