Assertion : Intercalated discs are important regions of cardiac muscle cells.
Reason : Intercalated disce function as boosters for muscle contraction waves.

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion and reason are false
D. If the assertion is false but reason is true

Answer

A

Explanation

Cardiac muscle cells are short cylindrical cells joined end to end and by side branching to form a network Intercalated discs are the dense junctions formed in between the cardiac muscle cells where they meet each other. Intercalated disce are the specialised regions of the cell membranes. As cardiac muscle possesses considerable rhythmicity and generates its own wave of excitation, these discs function as boosters for muscle contraction wave.