Question

What are the striations of a skeletal muscle cell produced by, for the most part?

Answer 1

Striations of a skeletal muscle is produced by unique arrangement of myofilaments actin and myosin within it.

Explanation:

A skeletal muscle cell would be known as a muscle fibre.

Inside each cell, parallel bundles of myofibrils are present. Myofibrils show alternate banding pattern on it: dark bands are anisotropic (under polarised light) or A band and light bands are isotropic (under polarised light) or I band. Each A band along with half of the I bands on its two sides form a sarcomere: a unit of contraction.

Banding pattern appears due to special arrangement of actins and myosins.The dark A band has both actin and myosin, while lighter I band has only actin.

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