Biology, 18.01.2020 01:31 mathwhiz9125
An antigen can induce an immune response in a host organism. antigens are targeted by antibodies that are produced by the organism’s immune system in response to contact with the antigen. antibodies are specific to antigens. many different cell types are involved in immune responses. which of the following best describes the role of cell-to-cell communication during a response to an invasion of antigens?
a. a macrophage cell engulfs a pathogen in the blood.
b. antigens attaching to receptors on memory b cells stimulate the memory b cells to become plasma cells.
c. antigen-presenting cells engulf antigens at the first exposure.
d. chemicals that are secreted from antigen-presenting cells then activate t cells.
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