Podcast
Questions and Answers
What is the source of the electrical stimulus that initiates the heart's beating?
What is the source of the electrical stimulus that initiates the heart's beating?
- Ventricular muscle
- SA node (correct)
- Atrioventricular node
- Bundle of His
What is the function of the ventricles in the heart?
What is the function of the ventricles in the heart?
- To pump blood to the lungs (correct)
- To generate electrical impulses
- To initiate the heartbeat
- To receive blood from the atria
What is the role of the bundle of His in the cardiac conduction system?
What is the role of the bundle of His in the cardiac conduction system?
- To produce action potentials
- To regulate the heart rate
- To conduct electrical impulses to the ventricles (correct)
- To contract the ventricles
Where does the electrical impulse travel after leaving the SA node?
Where does the electrical impulse travel after leaving the SA node?
Which part of the heart is known as the natural pacemaker?
Which part of the heart is known as the natural pacemaker?
Which chamber of the heart is particularly constructed to work as pressure pump?
Which chamber of the heart is particularly constructed to work as pressure pump?
What is the normal range of electrical stimulus generation by the sinus node per minute under normal conditions?
What is the normal range of electrical stimulus generation by the sinus node per minute under normal conditions?
Where does the electrical impulse travel after leaving the atrioventricular node?
Where does the electrical impulse travel after leaving the atrioventricular node?
Which part of the heart represents one heartbeat with each contraction of the ventricles?
Which part of the heart represents one heartbeat with each contraction of the ventricles?
What is the function of the SA node in the heart's electrical conduction system?
What is the function of the SA node in the heart's electrical conduction system?
Flashcards
SA node
SA node
The source of the electrical stimulus that initiates the heart's beating.
Ventricles
Ventricles
Chambers that pump blood to the lungs and body.
Bundle of His
Bundle of His
Conducts electrical impulses to the ventricles.
AV node
AV node
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Heartbeat cycle
Heartbeat cycle
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Electrical impulse generation rate
Electrical impulse generation rate
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Function of SA node
Function of SA node
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Pressure pump
Pressure pump
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Path of electrical impulse
Path of electrical impulse
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Impulses after AV node
Impulses after AV node
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Study Notes
Cardiac Conduction System
- The SA node (Sinus Node) is the source of the electrical stimulus that initiates the heart's beating, and it is known as the natural pacemaker.
- The SA node generates electrical stimuli at a normal range of 60-100 per minute under normal conditions.
Ventricles
- The ventricles are particularly constructed to work as pressure pumps, pumping blood out of the heart.
Bundle of His
- The bundle of His is a part of the cardiac conduction system that transmits the electrical impulse from the atrioventricular node to the ventricles.
Cardiac Conduction Pathway
- After leaving the SA node, the electrical impulse travels to the atrioventricular node.
- After leaving the atrioventricular node, the electrical impulse travels to the bundle of His, and then to the ventricles.
- A single heartbeat represents one contraction of the ventricles.
SA Node Function
- The SA node's function is to generate electrical stimuli and regulate the heart's rhythm.
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Description
Test your knowledge on the electrical properties of the heart, including the origin and spread of cardiac excitation, properties of cardiac muscle, and action potentials. Learn about the dynamic, electrically activated, chemically sensitive, and mechanical pump with a regular rhythm.
