2598047
Description
Flashcards by Charlotte Hewson, updated more than 1 year ago
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Created by Charlotte Hewson
over 9 years ago
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| Question | Answer |
| what are the two main types of defence of the human body? | non-specific and specific |
| what is a non-specific response? | doesn't distinguish between types of pathogens, responds to all in the same way |
| what are the two forms this can take? | -phagocytosis -barrier to the entry of pathogens |
| what is a specific response? | do distinguish between different pathogens. less rapid but provide long-lasting immunity |
| what type of blood cell does this use? | white blood cell called lymphocyte |
| what are the two forms this can take? | - cell-mediated responses involving T lymphocytes - humoral responses involving B lymphocytes |
| what would happen if lymphocytes couldn't distinguish between self and non-self material? | it would destroy the organisms own tissue |
| why is there a time lag between exposure to pathogen and bodies defences bringing it under control? | the antibody already exists and has to reproduce enough numbers to be effective in destroying the pathogen |
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