Cardiac Muscle Cell Development and Structure Quiz
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Questions and Answers

Which type of muscle cells form complex junctions between interdigitating processes known as intercalated disks?

  • Skeletal muscle cells
  • Smooth muscle cells
  • Embryonic muscle cells
  • Cardiac muscle cells (correct)
  • What is the major fuel source for the heart?

  • Carbohydrates
  • Nucleic acids
  • Proteins
  • Fatty acids (correct)
  • What is the main reason why cardiac muscle cells are highly resistant to fatigue?

  • They have a single nucleus
  • They have a high number of mitochondria (correct)
  • They have complex junctions
  • They contain actin and myosin
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