Lab Exercise 4: Electrophysiology of the Heart Quiz

What is the primary purpose of the Lab Exercise 4: Electrophysiology of the Heart?

• To study the electrical events of the heart.

• To study the mechanical events of the heart.

• To analyze blood flow in the heart.

• To examine the structure of heart valves.

Which activity involves identifying parts of an ECG?

• Activity 1

• Activity 2

• Activity 3

• Activity 4

What is the focus of Activity 2 in the lab exercise?

• Effect of Vagal Stimulation

• Ions on Heart Rate

• Abnormal ECG's

• Mapping Electrical Pathways

Which learning objective involves defining chronotropic factors?

• O-6

• O-4

• O-2

• O-8

What is cardiac output determined by?

• Blood pressure and heart rate

• Heart rate and stroke volume

• Stroke volume and blood pressure

• Heart rate and blood pressure

What is the role of the SA node in the heart?

• It acts as a secondary pacemaker

• It controls blood pressure

• It is the primary pacemaker

• It regulates stroke volume

What are autorhythmic cells capable of?

• Contracting without external stimulation

• Depolarizing without external stimulation

• Increasing blood pressure

• Decreasing heart rate

What is the role of the atrioventricular (AV) node in the cardiac conduction system?

• It initiates the heartbeat.

• It speeds up the electrical conduction.

• It slows the electrical conduction for complete atrial contraction.

• It directly contracts the ventricles.

What does an electrocardiogram (ECG) measure?

• Mechanical activity of the heart.

• Electrical activity of the heart.

• Blood pressure in the heart.

• Oxygen levels in the blood.

Which part of the cardiac conduction system is responsible for propagating signals to the ventricles?

• Sinoatrial node

• Atrioventricular node

• Purkinje fibers

• Superior vena cava