Final answer:
The striped appearance of skeletal muscle tissue is due to the regular arrangement of actin and myosin filaments within sarcomeres along myofibrils, creating repeating dark and light bands.Option B is the correct answer.
Step-by-step explanation:
The characteristic striated (striped) appearance of skeletal muscle is due to the arrangement of alternating protein filaments, which are composed primarily of actin and myosin. These filaments are organized in repeating units called sarcomeres, which are the functional units of muscle contraction. Within each sarcomere, the proteins create alternating dark A bands and light I bands that repeat along the myofibrils. The alignment of these myofibrils within the muscle cell gives the cell its characteristic striated or banded appearance.
The striated appearance of skeletal muscle stems from the orderly arrangement of protein filaments, mainly actin and myosin. These filaments form repeating sarcomeres, the fundamental units of muscle contraction. Sarcomeres exhibit alternating dark A bands and light I bands along myofibrils, creating the characteristic striped pattern. The alignment of myofibrils within muscle cells contributes to this striation. This structural organization is essential for coordinated muscle contraction, with sarcomeres serving as the functional units that enable the precise and efficient movement of skeletal muscles.