Assertion (A) Cardiac muscle tissue is a contractile tissue present only in heart. Reason (R) Cardiac muscle tissue provides rhythmic contraction to the heart.

Question

Assertion (A) Cardiac muscle tissue is a contractile tissue present only in heart. Reason (R) Cardiac muscle tissue provides rhythmic contraction to the heart. (A) If both A and R are true and R is the correct explanation of A. (B) If both A and R are true, but R is not the correct explanation of A. (C) If A is true, but R is false. (D) If A is false, but R is true

Tardigrade Admin · Accepted Answer

Both Assertion and Reason are correct and Reason the correct explanation of Assertion.
Cardiac muscle tissue is a contractile tissue present only in the heart. Cell junctions present in the plasma membranes of cardiac muscle cells get fused and make them stick together. Communication junctions or intercalated discs at some points allow the cells to contract as a unit, i.e. when one cell receives a signal to contract, its neighbours are also stimulated.

Q. Assertion (A) Cardiac muscle tissue is a contractile tissue present only in heart. Reason (R) Cardiac muscle tissue provides rhythmic contraction to the heart.

If both A and R are true and R is the correct explanation of A.

If both A and R are true, but R is not the correct explanation of A.

If A is true, but R is false.

If A is false, but R is true

Q. Assertion (A) Cardiac muscle tissue is a contractile tissue present only in heart.
Reason (R) Cardiac muscle tissue provides rhythmic contraction to the heart.