Please match the specific immune response phase with the statements that most accurately describe them to test your understanding of the overall phases in a specific immune response.
1. lymphocytes arise from the same stem cells but differentiate into two distinct cell types
2. foreign cells bear molecules that are recognized by B cells or engulfed by dendritic cells or macrophages
3. involves production of antibodies by plasma cells
4. involves helper T cells and cytotoxic T cells
5. required for activation of T cells