Which tissue is composed of striated multinucleate cells?

• A. the brain
• B. the arm muscle
• C. the heart
• D. the stomach

Answer: (B)

Striated multinucleate cells are the hallmark of skeletal muscle tissue. Skeletal muscle fibers are long, cylindrical cells that fuse during development, resulting in multiple nuclei per fiber and a striped appearance due to the organized arrangement of actin and myosin filaments. The arm muscle is made of this tissue, so its cells are striated and multinucleate. Brain tissue consists of neurons and glia without this kind of striation and multinucleation; stomach is smooth muscle, which lacks striations; cardiac muscle is striated but typically has single or few nuclei per cell and is branched. Therefore, the arm muscle best fits the description.