The following is the normal pacemaker of the heart: a) SA Node b) AV Node c) Bun

Question

The following is the normal pacemaker of the heart: a) SA Node b) AV Node c) Bundle of His d) Left and Right Bundle Branches e) Purkinje Fibers The following is located in the right upper atrium: a) SA Node b) AV Node c) Bundle of His d) Left and Right Bundle Branches e) Purkinje Fibers The following is located in the right lower atrium: a) SA Node b) AV Node c) Bundle of His d) Left and Right Bundle Branches e) Purkinje Fibers The following is located at the top of the interventricular septum a) SA Node b) AV Node c) Bundle of His d) Left and Right Bundle Branches e) Purkinje Fibers The following is located along the interventricular septum. a) SA Node b) AV Node c) Bundle of His d) Left and Right Bundle Branches e) Purkinje Fibers

Explanation / Answer

Ans-91 (a)

SA node (sinoatrial node) is called natural pacemaker of heart which is situated in the upper part of the wall of the atrium. Electrical impulses are generated from here which is responsible for contraction of heart.

Ans-92 (a)

SA node (see answer 91)

Ans-93 (b)

AV node (atrioventricular node) which is present in the lower back section of the interaterial septum which conducts the electrical impulse from atria to ventricle.

Ans-94 (c)

Bundle of His present at the top of the intraventricular septum which transmit the electrical impulse from AV to bundle branches.

Ans-95(d)

Left and right bundle branches are located along the interventricular septum .they play an integral role in electrical conduction system by transmitting cardiac action potential to the purkinje fibre.

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