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nmdcat.online July 28, 2026

During the physiological response to a sudden drop in environmental temperature, a specific type of muscle tissue contracts rapidly to generate heat. Which structural feature characterizes the cells of this tissue?

A. Unstriated, spindle-shaped cells
B. Multinucleated, unbranched cylindrical cells
✓
C. Uninucleated, branched striated cells
D. Spindle-shaped cells with intercalated discs

📝 Explanation

Shivering thermogenesis is mediated by skeletal muscles. Skeletal muscle fibers are characterized by being long, cylindrical, unbranched, and multinucleated, with the nuclei located peripherally just beneath the sarcolemma.

📖 Additional Information

  • Unstriated, spindle-shaped cells
  • Multinucleated, unbranched cylindrical cells
  • Uninucleated, branched striated cells
  • Spindle-shaped cells with intercalated discs

Shivering thermogenesis is mediated by skeletal muscles. Skeletal muscle fibers are characterized by being long, cylindrical, unbranched, and multinucleated, with the nuclei located peripherally just beneath the sarcolemma.

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