the human defence system Flashcards
(15 cards)
pathogen
an organism that causes disease
immunity
the ability to resist infection
general defence system
acts as a barrier to all all pathogens attempting to gain entry to the body
specific defence system
attacks specific pathogens
antigen
a foreign molecule that stimulates the production of antibodies
antibody
a protein produced by white blood cells(lymphocytes) in response to a specific antigen
induced immunity
the ability to resist disease caused by specific pathogens by the production of antibodies
active immunity
involves the production of a persons own antibodies in response to a foreign antigens
passive immunity
when individuals are given antibodies that were formed by another organism
plasma b cells
produce antibodies
memory b cells
survive for many years after infection and can make the specific antibody if the same pathogen re enters
helper T cells
stimulate b cells and killer T cells
killer T cells
destroy abnormal body cells
suppressor T cells
inhibit the immune response
memory t cells
survive for years after infection stimulate b cells and killer T cells if sam pathogen re enters
