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BIO NMDCAT Muscles
nmdcat.online July 28, 2026

A biological comparison of muscle cell nuclei reveals that while smooth and cardiac muscles generally have single, centrally located nuclei, skeletal muscle cells are multinucleated. The most appropriate explanation for this multinucleation is:

A. The fusion of multiple embryonic myoblasts during muscle fiber development
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B. The continuous division of the nucleus without cytokinesis during exercise
C. The need for multiple nuclei to synthesize sufficient ATP for contraction
D. The fusion of satellite cells with the sarcolemma during muscle repair

📝 Explanation

During embryonic development, skeletal muscle fibers are formed by the end-to-end fusion of many individual precursor cells called myoblasts. Because the cells fuse but their nuclei remain, the resulting mature muscle fiber is a massive multinucleated syncytium.

📖 Additional Information

  • The fusion of multiple embryonic myoblasts during muscle fiber development
  • The continuous division of the nucleus without cytokinesis during exercise
  • The need for multiple nuclei to synthesize sufficient ATP for contraction
  • The fusion of satellite cells with the sarcolemma during muscle repair

During embryonic development, skeletal muscle fibers are formed by the end-to-end fusion of many individual precursor cells called myoblasts. Because the cells fuse but their nuclei remain, the resulting mature muscle fiber is a massive multinucleated syncytium.

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