Immunology - Exam 3 - Practice Questions

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C. immediate hypersensitivity

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A. anaphylaxis

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D. Type II hypersensitivity reactions.

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A. Type I hypersensitivity reaction

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E. Type IV, mediated by CD4+ T cells

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C. Type III, mediated by IgG antibodies.

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B. Type II, mediated by IgG or IgM antibodies

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B. delayed-type hypersensitivity.

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A. Completion of the classical pathway to the splitting of C3

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B. Corticosteroids

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C. Switch recombination mediated by activation-induced cytidine deaminase.

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C. L-selectins

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C. Cytotoxic T lymphocytes

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D. Type IV hypersensitivity

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C. Reduced follicles and germinal centers

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D. Macrophages

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D. Immediate hypersensitivity is driven by cytokines such as interleukin (IL)-4, IL-5, and IL-13.

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B. DiGeorge syndrome with developmental defects in the thymus.

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C. CD19

Decrease in B cells, which should express CD19.

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C. Activated CD4+ and CD8+ T cells

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D. NK-cells are part of the innate immune system

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C. CTLA-4 on T-cells competes with CD28 for binding to B7 on B-cells

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D. T-cells with strong affinity to autologous peptide: MHC complexes

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C. By tagging the tumor cells for destruction mediated by the complement system and/or by inducing antibody-dependent cell-mediated cytotoxicity.

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E. Repeated injury and the following inflammation can cause autoimmunity.

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A. Signal 1 from antigen through the B cell receptor and signal 2 from activated CD4 T-cells.

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