MGD Lecture 7: Ne 2024 by Dr. Asaad Alasady
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Questions and Answers

What is the primary mechanism by which a decrease in cytosolic calcium ions leads to vasodilation?

  • Stimulation of calcium-activated potassium channels
  • Inhibition of myosin light chain kinase
  • Activation of myosin light chain phosphatase (correct)
  • Inhibition of voltage-gated calcium channels
  • Which of the following is a characteristic of vascular smooth muscle cells?

  • High velocity of contraction
  • Fast-twitch, high-force generation
  • Slow-twitch, low-force generation (correct)
  • Long duration of contraction
  • What is the effect of an increase in cytosolic calcium ions on the contraction of vascular smooth muscle cells?

  • Calcium binds to and activates calmodulin, leading to smooth muscle relaxation
  • Calcium binds to and activates troponin, leading to smooth muscle contraction
  • Calcium binds to and activates calmodulin, leading to smooth muscle contraction (correct)
  • Calcium binds to and activates troponin, leading to smooth muscle relaxation
  • What is the role of myosin light chain kinase in vascular smooth muscle contraction?

    <p>It phosphorylates and activates myosin light chain</p> Signup and view all the answers

    What is the effect of phosphorylation of myosin light chain on vascular smooth muscle contraction?

    <p>It increases the ATPase activity of myosin, leading to smooth muscle contraction</p> Signup and view all the answers

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    Test your knowledge of Management and Governance Dynamics (MGD) with this lecture 7 quiz, covering topics by Dr. Asaad Alasady. Evaluate your understanding of Ne 2024 concepts and principles. Ideal for students and professionals in the field.

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