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Defence System

TermDefinition
Immunity The ability of organisms to defend themselves against pathogens and toxins
Pathogens An organism that causes disease
General Defence System Non-specific defence consisting of barriers to prevent entry of all pathogens
Specific Defence System Protects against particular pathogens. It involves white blood cells producing either producing specific antibodies or directyl destroying infected cells
Antigens Non-self chemical that stimulates the production of antibodies
Antibodies Specific proteins produced by lymphocytes in response to the presence of an antigen
Induced Immunity The ability to resist disease caused by specific pathogens by the production of antibodies
Active Immunity Involves the body producing its own antibodies
Natural Active Immunity Acquired due to normal infection
artificial Active Immunity Acquired when a person is given a dose of inactivated pathogen i.e. vaccination
Vaccination A dose of inactivated pathogen which doesn't cause disease, but triggers the production of antibodies
Passive Immunity Occurs when someone is given antibodies made by another organism
Natural Passive Immunity Occurs when a baby get antibodies from its mother
Artificial Passive Immunity Occurs when a person is injected with antibodies made by another organism
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