Multiple choice

Which term describes the units of associated thick and thin fibers?

  1. Sarcomeres

  2. Actinomeres

  3. Mycomeres

  4. Muscle Bundles

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A Correct answer
Explanation

A sarcomere is the basic functional and structural unit of a muscle myofibril, composed of organized arrays of overlapping thick (myosin) and thin (actin) filaments. It is bounded by Z-lines and shortens during muscle contraction.