Answer:
The mechanism by which cells are able to discriminate between self and non-self antigens is known as self/non-self recognition. This process is achieved through the presence of special immune system cells, known as T and B lymphocytes, that have receptors on their surface capable of recognizing specific antigens. T and B cells are able to distinguish between self and non-self antigens through the process of clonal selection, where only the T and B cells with receptors capable of recognizing non-self antigens are activated and undergo proliferation to mount an immune response against the invading pathogen. This process helps to prevent an immune response against the body's own tissues, and ensures that the immune system only targets invading pathogens.
Step-by-step explanation: