Q. Choose the correct statement about SA node I. Located at lateral wall of the right atrium II. Herat of heart III. It initiates the rhythmic contractile activity of the heart and maintains it IV. It is called pace keeper of the heart V. It is called pace maker of the heart The option with correct statements is
A) All except III
B) All except IV
C) All except V
D) None of these
Explanation
SA node is called the pacemaker of the heart (not pace keeper) because it is the site at, which the initiation of the contraction originates
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.