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BIO NMDCAT Muscles
nmdcat.online July 28, 2026

The characteristic feature that distinguishes skeletal muscle from smooth muscle is the presence of:

A. Single central nucleus
B. Involuntary control
C. Distinct cross striations
✓
D. Spindle-shaped cells

📝 Explanation

Correct: Skeletal muscle is striated due to the organized arrangement of actin and myosin filaments. A: Smooth muscle also has a single central nucleus. B: Skeletal muscle is voluntary. D: Spindle-shaped cells are characteristic of smooth muscle. Concept: Structural comparison of muscle types.

📖 Additional Information

  • Single central nucleus
  • Involuntary control
  • Distinct cross striations
  • Spindle-shaped cells

Correct: Skeletal muscle is striated due to the organized arrangement of actin and myosin filaments. A: Smooth muscle also has a single central nucleus. B: Skeletal muscle is voluntary. D: Spindle-shaped cells are characteristic of smooth muscle. Concept: Structural comparison of muscle types.

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