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