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nmdcat.online July 28, 2026

In living organisms, the regulation of blood pressure is heavily dependent on the diameter of arterioles. The muscle tissue responsible for controlling this diameter is characterized by:

A. Multinucleated cells under somatic control
B. Branched cells with dense bodies
C. Spindle-shaped cells lacking sarcomeres
✓
D. Striated cells controlled by the autonomic nervous system

📝 Explanation

Arteriolar diameter is controlled by vascular smooth muscle. Smooth muscle cells are spindle-shaped, uninucleated, involuntary, and lack the organized sarcomeres that create striations in skeletal and cardiac muscle.

📖 Additional Information

  • Multinucleated cells under somatic control
  • Branched cells with dense bodies
  • Spindle-shaped cells lacking sarcomeres
  • Striated cells controlled by the autonomic nervous system

Arteriolar diameter is controlled by vascular smooth muscle. Smooth muscle cells are spindle-shaped, uninucleated, involuntary, and lack the organized sarcomeres that create striations in skeletal and cardiac muscle.

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