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Definition
| Resistance to disease due to the immune system's response to a microorganism or a vaccine. |
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| Foreign substance capable of stimulating an allergic response. |
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| Immune response to substances that usually are not recognized as foreign. |
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| Sever systemic form of allergic reaction involving bronchiolar constriction, impaired breathing, vasodilation, and a rapid drop in blood pressure with a threat of circulatory failure. |
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| Anitbody-Mediated Immunity |
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Definition
| Specific mechanism of defense in which plasma cells derived from B cells produce antibodies that combine with antigens. |
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| Amount of antibody present in a sample of blood serum. |
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Definition
| Foreign substance, usually a protein or a polysaccharide, that stimulates the immune system to produce antibodies. |
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| Antigen-Presenting Cell (APC) |
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Definition
| Cell that displays the antigen to the cells of the immune system so they can defend the body against that particular antigen. |
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Definition
| Programmed cell death involving a cascade of specific cellular events leading to death and destruction of the cell. |
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Definition
| Disease that results when the body mistakenly attacks its own tissues. |
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| One of three domains of life; prokaryotic cells other than archaea with unique genetic, biochemical, and physiological characteristics. |
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Definition
| 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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Definition
| The receptor on a B cell. The clonal selection model states that an antigen selects, then binds to the BCR of only one type B cell and then this B cell produces multiple copies of itself. The resulting group of identical cells is called a clone. |
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Definition
| Gelatinous layer surrounding the cells of blue-green algae and certain bacteria. |
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Definition
| Specific mechanism of defense in which T cells destroy antigen-bearing cells. |
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Definition
| A spherically-shaped bacteria. |
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Definition
| Series of proteins in plasma that form a nonspecific defense mechanism against a microbe invasion; it complements the antigen-antibody reaction. |
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Definition
| Type of protein secreted by a T cell that stimulates cells of the immune system to perform their various functions. |
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Definition
| T cell that attacks and kills antigen bearing cells. |
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Term
| Delayed Allergic Response |
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Definition
| Allergic response initiated at the site of the allergen by sensitized T cells, involving macrophages and regulated by cytokines. |
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Definition
| Small bristlelike fiber on the surface of a bacterial cell, which attaches bacteria to a surface. |
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Definition
| Slender, long extension that propels a cell through a fluid medium. |
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Definition
| Large proteins found in the blood plasma and on the surface of immune cells, functioning as antibodies. |
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Definition
| T cell that secretes cytokines that stimulate all kinds of immune system cells. |
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Definition
| Substance, produced by basophils in blood and mast cells in connective tissue, that causes capillaries to dilate. |
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Term
| Human Leukocyte Antigen (HLA) |
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Definition
| Protein in a plasma membrane that identifies the cell as belonging to a particular individual and acts as an antigen in other organisms. |
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Term
| Immediate Allergic Response |
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Definition
| Allergic response that occurs within seconds of contact with an allergen, caused by the attachment of the allergen to IgE antibodies. |
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Term
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Definition
| Ability of the body to protect itself from foreign substances and cells, including disease-causing agents. |
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Term
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Definition
| Use of a vaccine to protect the body against specific disease-causing agents. |
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Definition
| Inactivating the immune system to prevent organ rejection, usually via a drug. |
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Definition
| Tissue response to injury that is characterized by redness, swelling, pain, and heat. |
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Definition
| Antiviral agent produced by an infected cell that blocks the infection of another cell. |
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Definition
| Cytokine produced by macrophages and T cells that functions as metabolic regulator of the immune response. |
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Definition
| Fluid, derived from tissue fluid, that is carried in lymphatic vessels. |
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Definition
| Mass of lymphatic tissue not surrounded by a capsule. |
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Definition
| Organ other than a lymphatic vessel that is part of the lymphatic system; includes lymph nodes, tonsils, spleen, thymus gland, and bone marrow. |
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Term
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Definition
| Mass of lymphatic tissue located along the course of a lymphatic vessel. |
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