Module 4 glossary words Flashcards
Disease
a departure from good health caused by a malfunction of the mind or body which cases physical, mental or social symptoms.
Pathogens
Organisms that cause disease
Parasites
organisms that live in or on another living thing (host), causing it harm
Transmission
the way in which a pathogen or parasite travels from one host to another
Vector
an organism which carries a pathogen from one host to another
Immune response
the specific response to antigens on the cell surface membrane of a pathogen.It involves lymphocytes and the production of antibodies.
Primary defences
prevent pathogens from entering the body
Secondary defences
attempt to kill pathogens after they have entered the body
Non-specific
digest a range of pathogens
Antigens
protein/glycoprotein found on the cell surface membrane of cells. Foreign antigens stimulate an immune response.
Antibodies
proteins which identify and neutralise antigens. Each antibody is specific to a particular antigen due to the complementary shapes of the antigen and variable region of the antibody.
Vaccination
A deliberate exposure to antigenic material which activates the immune system, to make an immune response and provide immunity.
Natural immunity
gained in the normal course of living
Artificial immunity
is gained by an injection which is a deliberate exposure to antibodies that have not been made by the person’s own immune system
Passive immunity
acquired without the activation of the lymphocytes- provided by antibodies that have not been made by the person’s own immune system