Antigen-Presenting Cells (APCs) in Immune Response
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Questions and Answers

Which immune cells process and present antigens to T cells?

  • B cells and T cells
  • Epithelial reticular cells and endothelial cells
  • Macrophages and dendritic cells (correct)
  • Lymphocytes and fibroblasts

    • What is the primary function of cytokines?

  • To activate and differentiate immune cells (correct)
  • To recognize and respond to antigens
  • To engulf and digest foreign substances
  • To produce antibodies against pathogens

    • Which type of cytokine is produced by lymphocytes?

  • Interleukins
  • Chemokines
  • Monokines
  • Lymphokine (correct)

    • What is the main function of chemokines?

    <p>To induce the attraction of leukocytes to sites of inflammation</p> Signup and view all the answers

    Which cell type manufactures and releases cytokines, similar to T-helper cells?

    <p>Antigen-Presenting Cells (APCs)</p> Signup and view all the answers

    What type of cytokine is produced by any cell infected by viruses?

    <p>Interferons</p> Signup and view all the answers

    What is the primary function of TC cells?

    <p>To recognize antigens associated with MHC-I on the surface of other cells</p> Signup and view all the answers

    What is the role of CD markers on T cells?

    <p>To recognize the type of HLA (MHC) on the displaying cell surface</p> Signup and view all the answers

    What type of cells are responsible for killing virally and tumor-transformed cells as well as bacteria, parasites, and fungi?

    <p>Natural Killer Cells</p> Signup and view all the answers

    What is the process by which most natural antigens are processed?

    <p>Antigen processing by APCs</p> Signup and view all the answers

    What is the function of surface immunoglobulins (SIGs) on B cells?

    <p>To recognize specific antigens</p> Signup and view all the answers

    What type of cells undergo transformation to form plasma cells and B memory cells?

    <p>B cells</p> Signup and view all the answers

    What is a function of tumor necrosis factor?

    <p>Stimulates the expression of adhesion molecules</p> Signup and view all the answers

    What is the role of opsonization in the immune response?

    <p>To prepare bacteria to attach more easily to macrophages</p> Signup and view all the answers

    What is the function of the thymic cortex?

    <p>To provide a site for the maturation of T lymphocytes</p> Signup and view all the answers

    What is the purpose of the blood-thymus barrier?

    <p>To prevent the developing T cells from contacting blood-borne antigens</p> Signup and view all the answers

    What type of capillaries are found in the thymic cortex?

    <p>Continuous</p> Signup and view all the answers

    Why are self-macromolecules permitted to cross the blood-thymus barrier?

    <p>To eliminate those T cells that are programmed against self-antigens</p> Signup and view all the answers

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