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ZoologyNEET 2024Human heart, cardiac cycle and ECG

Body Fluids and Circulation

Following are the stages of the 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 the pathway from the options given below:

  1. A.A-E-C-B-D
  2. B.B-D-E-C-A
  3. C.E-A-D-B-C
  4. D.E-C-A-D-B✓

Solution

The impulse starts at the SA node, reaches the AV node, passes down the AV bundle, splits into the bundle branches and spreads through the Purkinje fibres: E, C, A, D, B.

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