Q. Sequence of electrical impulse in heart beat is
A) AV node $\rightarrow$ pacemaker $\rightarrow$ auricles $\rightarrow$ ventricles
B) Ventricle $\rightarrow$ pacemaker $\rightarrow$ AV node $\rightarrow$ auricle
C) Pacemaker $\rightarrow$ atria $\rightarrow$ AV node $\rightarrow$ ventricle
D) Pacemaker $\rightarrow$ AV node $\rightarrow$ atria $\rightarrow$ ventricle
Explanation
Sequence of electrical impulse in heart is Sinoauricular node (Pacemaker of heart) $\downarrow$ Atria $\downarrow$ Atrioventricular node (AV node) $\downarrow$ Bundle of His $\downarrow$ Ventricles $\downarrow$ Purkinje fibre
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.