Q. To which of the following, bundle of His passes stimulus of contraction?
A) AV-node
B) SA-node
C) Purkinje fibre
D) Atrium
Explanation
The waves of contraction originating from SA-node, when reaches the AV-node (pace-setter), the latter is simulated and excitatory impulses are rapidly transmitted from it to all parts of the ventricle $via$ bundle of His and Purkinje fibres.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.