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Immune System Smith

Immune System key terms

pathogen Organisms that cause diseases.
Immune Response Cells react to every kind of pathogen in a different way that is specialized for that certain pathogen.
Antibody Chemicals produced by B-cells that lock onto antigens
Passive Immunity When antibodies are given to the person and the immune system does not make them, it receives assistance.
Infectious Disease A disease that is passed from organism to organism.
Lymphocyte White blood cells that create the immune response.
Immunity Body’s ability to destroy pathogens before they can cause diseases.
Antibiotic A chemical that kills bacteria and/or slows the growth without harming body cells.
Pasteurization A heating process that kills microorganisms in food.
T cell Identifies different kinds of pathogens and tells them apart.
Active immunity When a person’s own immune system produces antibodies in response to the presence of a pathogen.
Allergy A disorder from the immune system being overly sensitive to a foreign substance.
Inflammatory response The second line of defense; fluids and white blood cells leak into nearby tissues and attack pathogens.
Antigen Molecules the immune system recognizes, on cells, that distinguish it as part of the body or from the outside of the body.
Vaccination Harmless antigens are introduced deliberately to a person’s body to produce active immunity.
Allergen Substance that causes an allergy.
Phagocyte White blood cells that that engulfs pathogens and destroys them.
B cell Produce chemicals that help destroy each kind of pathogen.
Vaccine Consists of weak or dead pathogens that trigger immune system into action.
Histamine Chemicals responsible for the symptoms of an allergy.
Created by: silvercrescent