Question

which structure is highlighted? skeletal muscle fiber fascicle perimysium sarcomere

Explanation:

• Skeletal muscle fibers are long, cylindrical multinucleated cells with striations. In the image, the highlighted structure is a single skeletal muscle fiber.
• A fascicle is a bundle of muscle fibers, which is not what is highlighted here.
• Perimysium is the connective tissue surrounding a fascicle, not the fiber itself.
• A sarcomere is the basic unit of muscle contraction within a muscle fiber, a much smaller structure than the fiber shown.

Answer:

skeletal muscle fiber