Muscle Contraction and Relaxation

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Questions and Answers

Which of the following is responsible for the muscular rigidity that accompanies death and lasts for 24 hours?

  • Tropomyosin
  • Enzymatic degradation (correct)
  • Calcium
  • ATP

In which muscle type does calcium bind to troponin C?

  • All muscle types
  • Smooth muscle (correct)
  • Cardiac muscle
  • Skeletal muscle

What is required for relaxation to occur in muscle cells?

  • Enzymatic degradation
  • ATP
  • Tropomyosin
  • Calcium (correct)

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