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Which is pace setter of the human heart?
Option: 1
SA node
Option: 2
AV node
Option: 3
Purkinje fibres
Option: 4
Bundle of His
Answers (1)
Conducting system of the human heart
- In human heart, small groups of specialised neuromuscular cells are present within the myocardium.
- These neuromuscular cells initiate and conduct nerve impulses due to which a coordinated and synchronised contraction of the heart muscles is seen
- The components of conducting system of human heart includes sinoatrial node or SA node, Atrioventricular node or AV node, Bundle of His and Purkinje fibres
wherein,
-
Atrioventricular node or AV node
-
It includes a mass of self excitatory tissue located in the wall of atrial septum near the atrioventricular valves.
-
Generally, it works on stimulation by SA node, but it is also capable of initiating its own impulses.
-
It is also called as the pace setter of human heart
Hence, the correct answer is option b.
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