NEET · Biology · STD 11 - 15. Body fluids and criculations

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 \(A-E-C-B-D\)
B \( B-D-E-C-A\)
C \( E-A-D-B-C\)
D \(E-C-A-D-B\)

Verified Solution

Answer & Solution

Correct Answer

(D) \(E-C-A-D-B\)

Step-by-step Solution

Detailed explanation

Correct answer is option (\(4\)) because the correct pathway of conduction of action potential is \(\mathrm{SA} \rightarrow\) \(AV\) node \(\rightarrow\) \(AV\) bundle \(\rightarrow\) Bundle branches \(\rightarrow\) Purkinje fibres

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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