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Description
Flashcards by aliceoflynn , updated more than 1 year ago
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Created by aliceoflynn
over 11 years ago
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| Question | Answer |
| Pathogen | A micro-organism that causes disease |
| General Defense System | a barrier to all pathogens entering the body |
| Specific Defnese System | A barrier to particular pathogens attempting to enter the body |
| Phagocyte | White blood cell that engulfs pathogens |
| Macrophage | Large, longer living phagocyte that engulfs pathogens and then displays their antigens on their surface |
| Defence Protein: Complement Protein | Complement Proteins are activated by infection and destroy any pathogens that enter. |
| Defnece Protein: Interferon Proteins | Interferon Proteins prevent pathogens multiplying and spreading |
| Lymphocytes | to act as a specific defence system and produce B-Cells which trigger antibody production and T-Cells which destroy abnormal cells such as cancer cells. |
| Antibody | a specific defence protein produced by lymphocytes in response to specific antigens |
| Antigen | a chemical marker on the surface of a pathogen that distinguishes it from other pathogens and also triggers the production of antibodies |
| Immunity | is the body’s ability to resist infection |
| B-Lymphocyte | produce specific antibodies in response to specific antigens and mature in the bone marrow, B-Cells work in the lymphatic system especially spleen and lymph nodes |
| T-Lymphocytes | consist of Helper, Killer, Suppressor and Memory T-Cells, attack abnormal cells and mature in the Thymus Gland |
| Active Immunity | the body making its own antibodies in response to antigens/pathogens e.g. a vaccine for chicken pox which stimulates antibody production |
| Passive Immunity | the body receiving antibodies produced by another organism e.g. tetanus shot with antibodies produced by horse |
| Vaccination | the introduction of a non-lethal inactive dose of pathogen to the body. Active immunity is the body making its own antibodies. When a vaccine is introduced it triggers B-lymphocytes, plasma and memory b cells, to produce specific antibodies to the specific pathogen introduced i.e. active immunity is set in motion |
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