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  1. body movement
  2. maintenance of posture
  3. respiration
  4. constriction of organs
  5. production of heat


  1. Which of the following is true? 


  1. Skeletal muscle is capable of spontaneous contraction.
  2. Smooth muscle is found in the walls of hollow organs.
  3. Cardiac muscle cells have multiple nuclei.
  4. Smooth muscle cells are long and cylindrical.
  5. There is a small amount of smooth muscle in the heart.


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