Q. The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of
A) Atrioventricular bundle
B) Purkinje system
C) Sinuatrial node
D) Atrioventricular node
Explanation
The pacemaker creates the rhythmical impulse normally made by SA (sinu-atrial) node. Hence, it is implanted at the site of SA-node to mimic the action and to regulate the heart beat. SA-node is found in the upper part of the right atrium of the heart. It is a specialized bundle of neurons (nerve cells).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.