In Graves' Disease (Hyperthyroidism),autoantibodies Bind to and Activate Receptors for Thyroid

question 36

Multiple Choice

In Graves' disease (hyperthyroidism) ,autoantibodies bind to and activate receptors for thyroid stimulating hormone (TSH) so that excessive T₄ (thyroxine) is secreted,causing clinical manifestations of an increased metabolism.This mechanism is an example of which Type II hypersensitivity reaction?

• A) Modulation
• B) Antibody-dependent cell-mediated (ADCC)
• C) Neutrophil-mediated damage
• D) Complement-mediated lysis

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