Answer:
is a way for a cell to give information about its activities.
Explanation:
Antigen processing refers to the process during which the antigens are degraded into small fragments. The small antigenic fragments that join the MHC molecules. The antigen-MHC complex is then presented on the surface of the plasma membrane of antigen-presenting cells. In this way, antigen processing and antigen presentation inform other immune cells about the presence of antigens/pathogen in the body.
For example, the T cells present in the lymphatic tissues are activated when they recognize the antigen-MHC II complexes and trigger the adaptive immune response.