Chp. 47

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Chp. 47
2010-03-16 21:21:14
Bio H

The Body's Defense System
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  1. Infectious Diseases
    Diseases that are caused by agents that have invaded the body
  2. Pathogen
    Any agent that causes disease
  3. Koch's Postulates
    "Rules" for determining the cause of the disease
  4. Mucous Membranes
    Epithelial tissues that protect the interior surfaces of the body that may be exposed to pathogens
  5. Inflammatory Response
    A series of events that suppress infection and speed recovery
  6. Histamine
    A substance that increases blood flow to the injured area and increases the permeability of surrounding capillaries
  7. Phagocytes
    Ingest and destroy pathogens and foreign matter
  8. Neutrophil
    The most abundant type of phagocyte in the body
  9. Macrophage
    Engulf pathogens and cellular debris, also a phagocyte
  10. Natural Cell Killers
    Large white blood cells that attack pathogen-infected cells -- not the pathogens themselves
  11. Complement System
    Made up of 20 different proteins, circulate in the blood and become active when they encounter certain pathogens
  12. Interferon
    A protein released by cells infected with viruses
  13. Immune System
    The cells and tissues that recognize and attack foreign substances in the body, provides the body's specific defenses
  14. Lymphocytes
    The white blood cells of the immune system
  15. Thymus
    A gland located above the heart, helps produce a special kind of lymphocyte
  16. Spleen
    The largest lymphatic organ in the body, stores healthy blood cells
  17. B Cells
    Made in the bone marrow and complete their development there
  18. T Cells
    Made in the bone marrow but complete their development only after traveling to the thymus
  19. Antigen
    Any substance that the immune system can recognize and react with
  20. Immune Response
    The reaction of the body against an antigen
  21. Helper T Cell
    A specialized lymphocyte
  22. Cell-Mediated Immune Response
    Increase in interleukin-2, which allows the T cells to divide even faster
  23. Cytotoxic T Cells
    Recognize and destroy cells that have been infected by the pathogen
  24. Humoral Immune Response
    Involves the action of B cells and occurs at the same time the cell-mediated immune response occurs
  25. Plasma Cells
    Highly specialized cells that make defensive proteins called antibodies that are released into the blood
  26. Antibody
    Binds to a specific antigen or inactivates or destroys toxins
  27. Memory Cells
    Lymphocytes that will not respond the first time that they meet with an antigen or an invading cell but will recognize and attack that antigen or invading cell during later infections
  28. Immunity
    The ability to resist an infectious disease
  29. Vaccination
    The introduction of antigens into the body to cause immunity
  30. Asthma
    A respiratory disorder that causes the bronchioles to narrow
  31. Autoimmune Disease
    A disease in which the immune system attacks the organism's own cells
  32. HIV
    AIDS results from infection by the human immunodeficiency virus
  33. Opportunistic Infections
    Illnesses caused by pathogens that produce disease in people with weakened immune systems
  34. AIDS
    When the immune system loses its ability to fight off pathogens and cancers