NEET Biology Body Fluids And Circulation Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Question & Answer Discuss:

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

(a) It delays the transmission of impulse between the atria and ventricles.

(b) It can change contractile activity generated by AV node.

(c) It gets stimulated when it receives neural signal.

(d) It initiates and maintains the rhythmic contractile activity of heart.