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pathogens EOY exam

questions and answers from EOY pathogens test

TermDefinition
T lymphocytes destroy infected cells making memory cells & destroy infected cells
B lymphocytes produce antibodies
pathogen Disease causing organism
explain why people who want to protect themselves against the flu virus need to have a new flu vaccination every year Flu virus has a high mutation rate: not recognised by the immune system. The body doesn’t have the antibodies & not able to recognise the new antigens
artificial immunity vaccinations
natural immunity immunity you gain from having the disease before, because your Memory cells produced antibodies that will recognise the foreign pathogen when it next appears in the body, so faster immune response.
Antibodies recognise foreign proteins on the surface of the pathogen: bind to the antigen causing pathogen to clump so they can be destroyed by the Immune system/phagocytes
Memory cells produced antibodies that will recognise the foreign pathogen when it next appears in the body, so faster immune response
Explain Bacteria that cause food poisoning are able to survive in acidic conditions. Pathogen numbers are large so increased chance of some getting past the defence mechanism. Pathogens mutate and body doesn’t recognise them.PATHOGENS DEVELOP ADAPTIONS THEREFORE NOT KILLED.
Saliva has enzyme lysozyme that... destroys bacteria Pathogens bound by saliva and carried to stomach for acid to destroy pathogens
lymphocyte. White blood cell in lymph & nodes that Makes antibodies
Explain how active immunity is gained. person gets the virus & gains Immunity as the body makes antibodies in response to pathogen. gained active immunity after recovering from chicken pox.
Created by: Ella.scopas
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