Question

SA node is called pace maker of the heart. Why?

• A. It can change contractile activity generated by AV node
• B. It delays the transmission of impulse between the atria and ventricles
• C. It gets stimulated when it receives neural signal
• D. It initiates and maintains the rhythmic contractile activity of heart

Answer 1

Answer: (D)

Correct answer is (d) It initiates and maintains the rhythmic contractile activity of heart