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Cardiac Muscle Cells
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Cardiac Muscle Cells

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Questions and Answers

Which structure in cardiac muscle cells is responsible for firm adhesion between cells?

  • Intercalated discs
  • Myofibrils
  • Gap junctions
  • Desmosomes and other adherent junctions (correct)

    • What is the main function of the intercalated discs in cardiac muscle cells?

  • To regulate the contraction mechanism
  • To allow muscle fibers to interweave
  • To provide structural support
  • To connect the cells in a series (correct)

    • How do the myofibrils in cardiac muscle cells compare to those in skeletal muscle?

  • Nonexistent in cardiac muscle cells
  • Similar in density and organization
  • Denser and more organized
  • Sparser and less well-organized (correct)

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