Which of the following statements is/are correct? a. Antigen-presenting cells do not possess MHC class I structures. b. Antigen-presenting cells present antigen in conjunction with MHC class II to helper T-lymphocytes. c. The CD4 structure is involved with MHC class II recognition. d. Cytotoxic T-lymphocytes recognize antigen in conjunction with MHC class I. e. The CD8 structure is limited to cytotoxic T-lymphocytes. Which of the following statements is/are correct? Binding of CD40 on the antigen-presenting cell to CD40L on the naïve T-cell results in increased CD80/86 expression on the antigen-presenting cell. Co-stimulation of naïve T lymphocytes requires binding of ICAM-1 proteins on the antigen-presenting cells to LFA-1 proteins on the T lymphocytes. CD28, CD80, and CD86 are examples of cell adhesion molecules. Co-stimulation of naïve T lymphocytes requires binding of CD80/86 proteins on the antigen-presenting cells to CD28 receptors on the T lymphocytes. Mechanisms from the Innate immune response contribute to the activation of T-cells. The interaction between antigen-MHC complex on the antigen-presenting cells and the T-cell receptor complex on the helper T lymphocytes is sufficient to activate a naive T cell. Does Hyper-IgM Syndrome (yes/no) result from a defect in early B-cell maturation? Does Hyper-IgM Syndrome (yes/no) result in the production of large amounts of monoclonal IgM? Does Hyper-IgM Syndrome (yes/no) result from defective CD28 on his antigen-presenting cells? Does Hyper-IgM Syndrome (yes/no) result from defective CD40L on his T lymphocytes? Does Hyper-IgM Syndrome (yes/no) result from defective CD80/86 on his helper T lymphocytes? Is Hyper-IgM Syndrome (yes/no) also associated with the presence of otherwise rare IgM class autoantibodies? Does Hyper-IgM Syndrome (yes/no) reduce life expectancy? Can babies with Hyper-IgM Syndrome (yes/no) be protected from symptoms by maternal IgG for the first few months of life?
Added by Eric R.
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Step 1: Antigen-presenting cells do possess MHC class I structures. Show more…
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