Which statement best describes Skeletal muscle nuclei?

• A. Multiple, peripherally located nuclei, striated, voluntary
• B. One centrally located nucleus, not striated, involuntary
• C. Multiple centrally located nuclei, not striated, involuntary
• D. One peripherally located nucleus, striated, voluntary

Answer: (A)

Skeletal muscle fibers are multinucleated and have nuclei located peripherally just beneath the cell membrane. This happens because muscle fibers form by the fusion of many precursor cells, creating a syncytial cell with multiple nuclei. The tissue is striated due to the regular arrangement of sarcomeres, and it is under voluntary control through somatic motor neurons. So, a description that says multiple nuclei, located at the periphery, with a striated appearance and voluntary control best matches skeletal muscle.

The other descriptions mix in features that don’t fit skeletal muscle: a single central nucleus and non-striated appearance aligns more with smooth muscle, while central nuclei can occur in regenerating fibers but aren’t the normal arrangement for skeletal muscle; and a single nucleus with striation would not reflect the typical multinucleated nature of skeletal muscle fibers.