Given below are two statements.
Statement A: Purkinje fibres generate maximum action potentials, as many as SAN.
Statement B: They are modified cardiac muscle fibres.
In the light of above statements choose most appropriate answer from the options given below.

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Both statements A and B are false.

Statement A is true, but statement B is false.

Statement A is false, but statement B is true.

Both statements A and B are true.

answer is C.

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Detailed Solution

Sinoatrial node is the nodal tissue of heart located in the upper right corner of the right atrium. It can spontaneously depolarise and generate a cardiac action potential about 70-75 times per minute. Hence, is called the natural pacemaker.

Purkinje fibres are modified muscle fibres (cell) in the ventricular tissue of the heart. These are a part of conduction pathway which are specialised for conducting an action potential.

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