Which tissue is multinucleated and shows striations?

Which tissue is multinucleated and shows striations?

• A. Smooth muscle tissue
• B. Cardiac muscle tissue
• C. Nervous tissue
• D. Skeletal muscle tissue

Answer: (D)

Striations with multiple nuclei point to skeletal muscle tissue. These long, cylindrical muscle fibers form through the fusion of many precursor cells (myoblasts), creating a single fiber that contains many nuclei positioned just under the cell membrane. The striped appearance comes from the organized arrangement of actin and myosin into sarcomeres, the repeating units that give skeletal muscle its characteristic light and dark bands. Cardiac muscle is also striated, but its cells are typically centralized with intercalated discs that connect cells, and they are not arranged as multinucleated fibers like skeletal muscle. Smooth muscle lacks striations and typically has a single nucleus per cell.

Striations with multiple nuclei point to skeletal muscle tissue. These long, cylindrical muscle fibers form through the fusion of many precursor cells (myoblasts), creating a single fiber that contains many nuclei positioned just under the cell membrane. The striped appearance comes from the organized arrangement of actin and myosin into sarcomeres, the repeating units that give skeletal muscle its characteristic light and dark bands. Cardiac muscle is also striated, but its cells are typically centralized with intercalated discs that connect cells, and they are not arranged as multinucleated fibers like skeletal muscle. Smooth muscle lacks striations and typically has a single nucleus per cell.