Human Defence System Flashcards
Mutualistic bacteria
Both human and bacteria benefit from the relationship
Phagocytes
White blood cells that have the ability to engulf cellular debris and infectious material like bacteria and viruses
Specific defence system
Aim to prevent the entry if certain particular pathogens
Antigen
A chemical found on the surface of a pathogen which stimulates the production of antibodies
Antibody
A specific defence protein produced by a specific defence system on detection of an antigen
Induced immunity
Protection gained against a particular pathogen by the production of specific antibodies after the antigen on the pathogen has been detected
Passive induced immunity
Antibodies are produced and supplied by another organism
Active induced immunity
Patient produces antibodies in response to antigen detection
Vaccine
A vaccine is specially prepared material that carries the antigen and is given to induce active immunity against a specific pathogen
Immunisation
The protection against disease by vaccination or administration of antibodies
Lymphocytes
White blood cells formed in bone marrow and active in lymphatic tissue
B cells
Mature in bone marrow and move to lymph nodes. They recognise antigens. Most produce antibodies, some Raman as memory cells.
T cells
Mature in thymus
Helper T cells
Stimulate B cells and killer T cells.
Killer T cells
Cause abnormal cells to burst
