Question

cardic muscle pairs?​

Answer 1

Explanation:

There are four light chains, two pairs of Mr 18,000 to 20,000, with one polypeptide from each set bound with each head segment of the molecule. Associated with the globular head domain of cardiac myosin II is an actin-activated ATPase activity that functions in cross-bridge formation and contraction.

Answer 2

Answer:

Cardiac muscle fibers are syncytia of individual cells (cardiomyocytes) joined end-to-end at intercalated discs, which not only provide the structural stability of the fiber, but their content of gap junctions permits the free flow of the action potential down the length of the fiber