Q. The role of pace maker in heart is to
A) Accelerate blood circulation
B) Inhibit backflow of blood
C) Initiate heart beat
D) Stimulate blood pressure
Explanation
SA-node is also called as pacemaker or heart, pulsation centre. It is located in the right wall of right atrium below the opening of superior vena cava. SA-node is the main tissue of heart and has highest degree of autorhythmicity. SA-node initiates and regulates the speed of heart beat.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.