Exam 3

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Exam 3
2010-03-01 10:21:06
Summary of Functions of Cells Participating in Immune Responses

Chapters 22-23
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  1. Phagocytosis; Processing and presentation of foreign antigens to T cells; secretion of interleukin-1, which stimulates secretion of interleukin-2 by helper T cells and B cells; secretion of interferons that stimulate T cell growth.
  2. Processes and presents antigen to T cells and B cells; found in mucous membranes, skin, lymph nodes.
    Dendritic cell
  3. Processes and presents antigen to helper T cells.
    B cell
  4. Antigen-Presenting cells (APCS) are...
    • (1) Macrophages
    • (2) Dendrtic cell
    • (3) B cell
  5. Kills host target cells by releasing granzymes that induce apoptosis, perforin that forms channels to cause cytolysis, granulysin that destroys microbes, lymphotoxin that destroys target cell DNA, gama-interferon that attracts marcophages and increase their phagocytic activity, and macrophage migration inhibition factor that prevents macrophage migration from site of infection.
    Cyotoxic T cell
  6. Cooperates with B cell to amplify antibody production by plasma cells and secretes interleukin-2, which stimulates proliferation of T cells and B cells. May secrete gamma-IFN and tumor necrosis factor (TNF), which stimulate inflammatory response.
    Helper T cell
  7. Remains in lymphatic tissue and recognizes original invading antigens, even years after the first encounter.
    Memory T cell
  8. Diiferentiates into antibody-producing plasma cell.
    B cell
  9. Descendant of B cell that produces and secretes antobodies.
    Plasma cell
  10. Descendant of B cell tha tremains after an immune response and is ready to respond rapidly and forcefully should the same antigen enter the body in the furture.
    Memory B cell
  11. Lymphocytes
    • (1) Cyotoxic T cell
    • (2) Helper T cell
    • (3) Memory T cell
    • (4) B cell
    • (5) Plasma cell
    • (6) Memory B cell