What Is the Mechanism in Type I Hypersensitivity Reactions

question 26

Multiple Choice

What is the mechanism in type I hypersensitivity reactions?

• A) Antibodies bind to the antigen on the cell surface and cause lysis.
• B) Antibodies coat mast cells by binding to receptors that signal its degranulation followed by discharge of preformed mediators.
• C) Antibodies bind to soluble antigens that were released into body fluids and the immune complexes are deposited in the tissues.
• D) Cytotoxic T lymphocytes or lymphokines-producing Th1 cells attack and destroy cellular targets directly.

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