Final answer:
The communication between an antigen presenting cell and a T helper cell involves the T cell receptor (TCR), Major Histocompatibility Complex II (MHC II), and CD4, leading to the answer E) A, C, E.
Step-by-step explanation:
The communication between an antigen presenting cell and a T helper cell involves several key components. The T cell receptor (TCR) on the T helper cell binds to antigens that are presented with Major Histocompatibility Complex II (MHC II) molecules on the surface of the antigen presenting cell. Additionally, the CD4 molecule on the T helper cell facilitates the interaction with the MHC II molecule. Therefore, the correct answer to which components are involved in this communication is A) TCR, and E) MHC II, along with C) CD4. Hence, the correct option is E) A, C, E.
To clarify, T helper cells, which are CD4+, are involved in immunity by binding to the MHC II-antigen complex presented by antigen presenting cells. This interaction prompts both cells to release cytokines. The MHC I molecule, which is found on all nucleated cells, typically presents antigens to CD8+ cytotoxic T cells. The CD8 molecule is not involved in the interaction between antigen presenting cells and T helper cells, but rather with cytotoxic T cells.