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19 Cards in this Set
- Front
- Back
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what are natural killer cells
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WBC that destroy virus infected and cancerous cells
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What are the two chemicals released by natural killer cells
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perforins and granzymes
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What do perforins do?
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makes holes in the cells membranes
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What do granzymes do?
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enter the cell and break down its contents
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What is apoptis
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cell deathe
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What do compliments do when they are activated?
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inhance inflammation
mark bacteria for destruction causes cell lysis |
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What are interferons what do they do
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they are proteins secreted by virus infected cells
they protect neighbouring cells |
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What do leukocytes exposed to forign bodies secrete?
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chemicals called pyrogens
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What do pyrogens do
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casue the hypothalamus to increase its body temp set point
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What does the liver do in response to fever?
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retains zinc and iron so bacteria cant use it for growth
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What is an antigen
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An antigen is a substance that is a substance that provokes an immune response. It is the part of a pathogen or substance the immune system can recognise
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What are antibodies
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Proteins in the tissue or fluids that bind to specific antigens
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Where do T lymphocytes mature
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In the thalamus gland
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What do macrophages present on there surface after consuming a pathogen
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Its antigens
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What do helper T cells do
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Bind to the antigens that are present on the macrophage. They then release chemicals that casue multiplication of t and b cells
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What do plasma cells produce
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antibodies
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What do antibodies bind to
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Anitigens
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Antibodies can casue what?
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pathogens and antigens to stick togeather
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What cells do we gain after an imunistation
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Mmemory B cells
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