Question

which of the following represents the most logical sequence of events in a successful cell - mediated immune response that results in long - term immunity? 1 point
cytotoxic t cell activation > memory cell formation > antigen presentation > regulatory t cell action.
memory cell formation > t cell activation > regulatory t cell action > antigen presentation.
regulatory t cell action > antigen presentation > destruction of infected cells > t cell activation.
antigen presentation > t cell activation > destruction of infected cells > memory cell formation.

Explanation:

In a cell - mediated immune response, first, antigens are presented by antigen - presenting cells. This presentation activates T cells. Activated T cells, such as cytotoxic T cells, can then destroy infected cells. Finally, memory cells are formed for long - term immunity. Regulatory T cells help in regulating the immune response but are not the first steps in this sequence.

Answer:

Antigen presentation > T cell activation > Destruction of infected cells > Memory cell formation.