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nmdcat.online July 28, 2026

During vigorous exercise, the muscles that contract voluntarily to move the arms and legs are:

A. Cardiac muscles
B. Smooth muscles
C. Skeletal muscles
✓
D. Visceral muscles

📝 Explanation

Correct: Skeletal muscles are attached to bones and produce voluntary body movements. A: Cardiac muscle pumps blood. B & D: Smooth (visceral) muscles control internal organs. Concept: Voluntary muscle action.

📖 Additional Information

  • Cardiac muscles
  • Smooth muscles
  • Skeletal muscles
  • Visceral muscles

Correct: Skeletal muscles are attached to bones and produce voluntary body movements. A: Cardiac muscle pumps blood. B & D: Smooth (visceral) muscles control internal organs. Concept: Voluntary muscle action.

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