Immunology Basics

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Antibody

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protein molecule released by plasma cells which binds to a specific antigen

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Antigen

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substances or part of a substance recognized as foreign by the immune system; activates the immune system and reacts with immune cells

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Artificially Acquired Immunity

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defense against pathogen infection obtained through the use of vaccines or other treatments

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B Cells

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white blood cells which oversee humoral immunity and differentiate into antibody-producing plasma cells

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Fibrin

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fibrous insoluble protein formed during blood clotting

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Immune System

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body system responsible for attacking foreign substances or preventing their entry into the body

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Inflammation

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innate defense of the body to tissue injury; usually including the dilation of blood vessels, increased capillary permeability, and production of redness, heat, swelling and pain

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Memory Cells

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members of the B cell and T cell families which “remember” previous infectious agents so future infections by the same pathogens can be met with a faster response

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T Cells

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white blood cells which help maintain immunity and include helper T cells, cytotoxic T cells, and regulatory T cells

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Vaccine

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biological preparation used to provide artificially acquired active immunity.