The striated appearance of skeletal muscle is due to the arrangement of Blank______.Multiple choice question.T tubulesnucleicellsmyofilaments

The striated appearance of skeletal muscle is due to the arrangement of myofilaments.

Explanation:

Skeletal muscle fibers are characterized by a repeating pattern of light and dark bands, which give the muscle its striated appearance. This striation is primarily a result of the organized arrangement of myofilaments, specifically actin (thin filaments) and myosin (thick filaments).

1. Myofilaments: These are the contractile proteins within muscle cells. Myosin filaments are thick and have heads that bind to actin, while actin filaments are thinner and create the light bands seen under a microscope.

2. Sarcomere Structure: The structural and functional unit of skeletal muscle, known as the sarcomere, contains these myofilaments arranged in a specific pattern. The alternating bands created by the overlapping of actin and myosin contribute to the muscle's striated appearance.

3. Role of T Tubules and Nuclei: Though T tubules play a crucial role in conducting electrical impulses and ensuring synchronized contraction, they do not contribute to the striated appearance. Similarly, while skeletal muscle fibers have multiple nuclei, they are not responsible for the striations.

Therefore, the correct answer regarding the arrangement that leads to the striated appearance of skeletal muscle is "myofilaments."