Inflammatory Mediators Quiz
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Questions and Answers

Which cells are among the richest sources of histamine?

  • Mast cells (correct)
  • T cells
  • Macrophages
  • Eosinophils
  • What triggers the release of histamine from mast cells?

  • Binding of antibodies to T cells
  • Activation of B cells
  • Activation of macrophages
  • Binding of antibodies to mast cells (correct)
  • What is the effect of histamine on arterioles and venules?

  • Causes constriction of arterioles and decreases the permeability of venules
  • Causes irregular dilation and constriction of arterioles and venules
  • Has no effect on arterioles and venules
  • Causes dilation of arterioles and increases the permeability of venules (correct)
  • Which receptors does histamine bind to on microvascular endothelial cells?

    <p>H1 receptors</p> Signup and view all the answers

    What type of drugs are H1 receptor antagonists?

    <p>Antihistamine drugs</p> Signup and view all the answers

    Which of the following triggers the release of histamine from mast cells?

    <p>Products of complement called anaphylatoxins</p> Signup and view all the answers

    Which of the following is NOT a trigger for the release of histamine from mast cells?

    <p>Binding to H1 receptors</p> Signup and view all the answers

    Which of the following is a function of histamine?

    <p>Causes dilation of arterioles</p> Signup and view all the answers

    What triggers the release of histamine from mast cells in immediate hypersensitivity (allergic) reactions?

    <p>Binding of antibodies to mast cells</p> Signup and view all the answers

    Which of the following is a source of histamine?

    <p>Mast cells</p> Signup and view all the answers

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