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No, the purkinje fiber is not the natural pacemaker. The sinoatrial node (SA node) is the natural pacemaker of the heart.

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10y ago

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The actual contraction of the ventricles of the heart is stimulated by?

Sinoatrial (SA) Node or "Pacemaker"


What is the pacemaker for the entire myocardium?

The pacemaker of the entire myocardium is the: a) Atrioventricular junction b) bundle of his c) Purkinje fibers d) Sinoatrial node


Which structure of the heart provides the stimulation that causes the ventricles to contract?

purkinje fibers


What is the role of Purkinje fibres in the heart?

The Purkinje fibers work with the sinoatrial node to enable consistency in the contractions of the heart.Purkinje fibers are muscle fibers in the heart. They relay the contraction impulses from the bundle to the myocardium of the ventricles.Purkinje fibres transmit the signal that tells the heart to beat from the pacemakers to the heart muscle. They are even capable of generating their own signal if the pacemaker is damaged.


What fibers in the heart cause the ventricles to contract?

pukinje fibers


What are the structures involved in the conduction system of the heart?

Internal pacemaker , sinoatrial(sa) node, atrioventricular (av) node , atrioventricular bundle (bundle of his ) and purkinje fibres.


Specialized conductive cells of the ventricles are called fibers?

purkinje fibers


What is a bundle branch composed of?

Purkinje fibers.


What are the Fibers of the conduction system of the heart?

Fibers of the conduction system of the heart is called Purkinje fibers


Can purkinje fibers self-excite?

Purkinje fibers refer to a unique cardiac end-organ. They are split in atria and ventricles walls and can undergo self-excitation.


What do node cells of the heart depolarize?

purkinje fibers


Where is the electrical conduction of the atria located?

Purkinje fibers