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Assertion (A): Cardiac muscle is highly resistant to fatigue
Reason (R): The excitation of one myocardial cell results in the excitation of other myocardial cells, making the entire muscle to contract as one unit

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Both (A) and (R) are correct, and (R) is the correct explanation to (A)

Both (A) and (R) are correct, but (R) is not correct explanation to (A)

(A) is correct, but (R) is incorrect

(A) is incorrect, but (R) is correct

answer is B.

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Detailed Solution

Cardiac muscle is highly resistant to fatigue as they have numerous myoglobin pigment and mitochondria.

The excitation of one myocardial cell results in the excitation of other myocardial cells, making the entire muscle to contract as one unit. They exhibit functional syncytium.

Both statements are correct but the second one does not provide the appropriate explanation for the first statement.

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