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

• A. E-C-A-D-B
• B. A-E-C-B-D
• C. B-D-E-C-A
• D. E-A-D-B-C

Answer 1

The Correct Option is A

The correct sequence for the conduction of an action potential through the heart is:

- E. SA node initiates the action potential.

- C. AV node delays the impulse to allow ventricles time to fill.

- A. AV bundle transmits the impulse down the septum.

- D. Bundle branches carry the impulse to the Purkinje fibers.

- B. Purkinje fibers distribute the impulse to the ventricles, causing contraction. 

Thus, the correct answer is (4).