Home Biology Body Fluids and Circulation Skill Builder Following are the components involved in the…
Biology Body Fluids and Circulation Skill Builder Single Correct MCQ
Published on: August 14, 2026

Following are the components involved in the electrical signaling of the human heart:

A
Sino-atrial node
, , , ,
B
Atrioventricular node
, (E), , , (E), , (E),
C
Purkinje fibers
D
Bundle branches
(E) Atrioventricular bundle Arrange these in the correct sequence of action potential propagation: , , (E), , ,

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The action potential starts at the sino-atrial node and passes to the atrioventricular node . From the atrioventricular node, the action potential enters the atrioventricular bundle (E) and disperses via the right and left branches of the AV bundle , and finally to the Purkinje fibers , ensuring coordinated ventricular contraction.

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