Please help me match the answers, the answers are listed just not
in right order.
Exogenous are ingested and processed by the 2 and presented to the 3 using 4 , beginning the process of activation. Once activated, the T-helper cell begins to produce -5-that help the other cells of the immune system perform their functions. 1naïve CD4+ T cell 2 2 MHC-I 3 antigen presenting cell 4 cytokines 5 antigens





