Question

$\text{Assertion(A):}$ When one cardiac muscle fibre receives a signal to contract, its neighbouring cells are also stimulated to contract.
$\text{Reason(R):}$ Cardiac muscle fibres are branched and joined by intercalated discs at some fusion points.
Choose the correct option.

Answer 1

Answer (1)
Communication junctions (intercalated disc) at some fusion points allow the cells to contract as a unit, that is, when one cell receives a signal to contract, it's neighbours are also stimulated to contract.