Body Fluids and CirculationMedium
Question
Following are the stages of pathway for conduction of an action potential through the heart
A. AV bundle
B. Purkinje fibres
C. AV node
D. Bundle branches
E. SA node
Choose the correct sequence of pathway from the options given below
Options
A.B-D-E-C-A
B.E-A-D-B-C
C.E-C-A-D-B
D.A-E-C-B-D
Solution
Sol. [Key Concept: Cardiac conduction pathway]
The impulse follows SA node → AV node → AV bundle or bundle of His → right and left bundle branches → Purkinje fibres. This is E–C–A–D–B, option (3). Atrial excitation carries the impulse from the SA node towards the AV node.
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