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Mastering Smooth Muscle Contraction
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Mastering Smooth Muscle Contraction

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Questions and Answers

What is the main difference between the regulation of cardiac and smooth muscles?

  • Cardiac muscles are thick filament regulated while smooth muscles are thin filament regulated
  • Both cardiac and smooth muscles are thick filament regulated
  • Cardiac muscles are thin filament regulated while smooth muscles are thick filament regulated (correct)
  • Both cardiac and smooth muscles are thin filament regulated
  • What is a unique characteristic of cardiac muscle cells?

  • They are found in hollow organs
  • They can remain contracted for extended periods with low energy consumption
  • They have the inherent ability to generate rhythmic action potentials without external stimuli (correct)
  • They can contract in response to electrical or hormonal signals
  • What is a distinctive feature of smooth muscle cells compared to cardiac muscle cells?

  • Smooth muscles are found in hollow organs (correct)
  • Smooth muscles have the inherent ability to generate rhythmic action potentials without external stimuli
  • Smooth muscles are typically mononucleated or binucleated
  • Smooth muscles contain more connective tissue than skeletal muscle
  • What is the role of Titin in myocardial cells?

    <p>It tethers the thick filaments to the Z lines</p> Signup and view all the answers

    What is the function of intercalated disks in myocardial cells?

    <p>They connect cardiac muscle cells to each other</p> Signup and view all the answers

    Which components form the electrical junctions in myocardial cells?

    <p>Gap junctions</p> Signup and view all the answers

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