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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?

H1 receptors Signup and view all the answers

What type of drugs are H1 receptor antagonists?

Antihistamine drugs Signup and view all the answers

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

Products of complement called anaphylatoxins Signup and view all the answers

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

Binding to H1 receptors Signup and view all the answers

Which of the following is a function of histamine?

Causes dilation of arterioles Signup and view all the answers

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

Binding of antibodies to mast cells Signup and view all the answers

Which of the following is a source of histamine?

Mast cells Signup and view all the answers