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AICE Biology
Immunity
| Term | Definition |
|---|---|
| phagocytes | scavengers, remove dead cells and invasive microorganisms |
| neutrophils | travel throughout body, squeezes through the walls of capillaries to patrol the tissues, short lived cells but come in large numbers during infection. |
| macrophages | larger than neutrophils and found in organs. |
| monocytes | marcrophages in blood. |
| lymphocytes size | smaller than phagocytes, large nucleus fills most of the cells |
| B- lymphocytes | in bone marrow till mature, spread throughout body, concentrating in lymph nodes and spleen |
| T- lymphocytes | collects in thymus |
| primary response | slow because very B cells specific to antigen |
| secondary response | faster because memory cells, more antibodies |
| antibodies | globular glycoprotein and form plasma proteins (immunoglobulins) |
| antitoxins | block the toxins released by bacteria |
| vaccine | a preparation containing antigens which is used to stimulate an immune response artificially. |
| passive immunity | people did not produce the anitbodies |
| natural active immunity | activation occurs naturally during an infection |
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jcore