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12.3 Anatomy Vocab

TermDefinition
active immunity immunity in which the blood plasma cells in the body make antibodies as a result of previous exposure to a disease or a vaccine
Antigen-presenting cells (APCs) cells that process protein antigens and present them on their surface in a form that can be recognized by lymphocytes (white blood cells)
apoptosis a programmed process of cellular self destruction (cell suicide)
cellular immunity immunity that arises from the activation of T lymphocytes (T cells) by antigen-presenting cells; cell-mediated immunity
clonal selection repeated division of a lymphocyte that produces many exact genetic copies (clones) of itself
humoral immunity immunity associated with free antibodies that circulate in the blood; antibody-mediated immunity
immune system the cells and chemicals that contribute to the bodys specific defenses against disease
Immunoglobulins antibodies; proteins that recognize particular antigens with great specificity
Major Histocompatibility Complex glycoproteins (MHC) family of proteins found on the surfaces of lymphocytes and other cells; help the immune system recognize foreign antigens and ignore "self" tissues
memory cells B lymphocytes and T lymphocytes in lymphatic tissues that can respond if a previously encountered antigen invades the body again
passive immunity immunity that comes from antibodies received from an outside source, such as breast milk
Precipitation the formation of an insoluble complex, such as a clump of antigen molecules joined together by antibodies
Primary immune response the initial immune system response to a foreign invader such as a virus or bacterium
Secondary immune response immune system response to an infectious agent that it has encountered before
Created by: espindan1
 

 



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