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Questions and Answers
Which structure in the heart is known as the pacemaker?
Which structure in the heart is known as the pacemaker?
- Atrioventricular bundle (bundle of His)
- Purkinje fibers
- Sinoatrial node (SAN) (correct)
- Atrioventricular node (AVN)
What is the function of the atrioventricular node (AVN) in the conduction system of the heart?
What is the function of the atrioventricular node (AVN) in the conduction system of the heart?
- Allow time for the atria to contract and complete the filling of the ventricles (correct)
- Rapidly distribute excitation wave throughout the ventricular walls
- Initiate the heartbeat
- Extend branches of fibers to all parts of the ventricular walls
Where are the Purkinje fibers located in the heart?
Where are the Purkinje fibers located in the heart?
- Ventricular walls (correct)
- Left bundle branches
- Right atrium
- Interventricular septum
What is the role of tight junctions between cardiac muscle cells?
What is the role of tight junctions between cardiac muscle cells?
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In which part of the heart is the conductivity highest due to rapid conduction of excitation wave?
In which part of the heart is the conductivity highest due to rapid conduction of excitation wave?
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