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17 Cards in this Set
- Front
- Back
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Allergens |
An antigen that triggers an exaggerated immune response. |
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Antibody |
A protein secreted by plasma cells that binds to a particular antigen. |
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Antigen |
A substance that elicits an immune response by binding to receptors of B cells (antibodies), or T cells. |
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Autoimmune Disease |
An immunological disorder in which the immune system turns against itself. |
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B Cells |
Lymphocyte that matures in the bone marrow and when stimulated by the presence of a specific antigen, gives rise to antibody-producing plasma cells. |
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Epitope |
A small, accessible region of an antigen to which an antigen receptor or antibody binds. |
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Histamine |
A substance released by mast cells that causes blood vessels to dilate and become more permeable in inflammatory and allergic responses. |
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Humoral Immune Response |
The branch of adaptive immunity that involved the activation of B cells and that leads to the production of antibodies, which defend against bacteria and viruses in body fluid. |
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Immune System |
An animal body's system of defenses against agents that cause disease. |
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Immunization |
The process of generating a state of immunity by artificial means. |
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Immunodeficiency |
A disorder in which the ability of an immune system to protect against pathogens is defective or absent. |
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Macrophages |
A phagocytic cell present in many tissues that functions in innate immunity by destroying microbes and in acquired immunity as an antigen-presenting cell. |
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Memory Cells |
One of a clone of long-lived lymphocytes, formed during the primary immune response, that remains in a lymphoid organ until activated by exposure to the same antigen that triggered its formation. |
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Primary Immune Response |
The initial adaptive immune response to an antigen, which appears after a lag of about 10-17 days. |
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Secondary Immune Response |
The adaptive immune response elicited on second or subsequent exposures to a particular antigen. The secondary response is more rapid, or greater magnitude, and of longer duration than the primary immune response. |
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T Cells |
The class of lymphocytes that mature in the thymus; they include both effector cells for the cell-mediated immune response and helper cells required for both branches of adaptive immunity. |
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Vaccination |
Also called active immunity. An inactive or weakened form of a pathogen is administered, including B and T cell responses and immunological memory. |
