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MDCAT Biology QUESTION #4263
Question 1
Which of the following muscle types are involuntary in action?
  • Skeletal and smooth
  • Skeletal and cardiac
  • Cardiac and smooth✔️
  • Smooth muscle only
Correct Answer Explanation
Cardiac muscle (heart) and smooth muscle (visceral organs) are both involuntary — they function without conscious control, unlike skeletal muscle.