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Biology, 30.01.2020 02:54 brookieharrisop5n7us
1. mike injured his knee while playing. examination revealed that the injured area was red, swollen, and warmer than the surrounding area. what does this condition indicate?
an inflammation
a tumor–like growth
a hemorrhage
2. when a virus invades the body, some b cells recognize it as nonself and produce plasma cells that release a substance to kill the virus. what is this substance called?
antigen
antibody
pathogen
3. which of the following forms blood clots?
fibrin
macrophages
thrombin
4. an antigen has invaded a mammal's body. specific immune cells engulf and ingest it. some of the digested pieces are displayed on the cells' bodies. what happens next?
b cells are activated and release antibodies.
t cells are activated and produce clones.
b cells withdraw the immune response as the antigen is killed.
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