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Tim Scott · Answer 1 · 2023-01-03T13:40:34+0000

Striations are caused by the arrangement of thick and thin filaments within the myofibrils. The A-Band is the dark area where the thin and thick filaments overlap.

Darsstar · Answer 2 · 2023-01-06T02:51:37+0000

Answer: Muscle fibers are composed of repeating units called sarcomeres, each composed of a series of repeating series of protein motifs that cause a signature striated appearance.

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