| A | B |
|---|
| T-dependent antigens | An antigen that requires T-cell help in order for B cells to respond. |
| T-independent antigens | Antigens that are able to elicit antibody formation in the absence of T cells. |
| Clonal expansion | Proliferation of lymphocytes during an immune response to create a population of identical cells, all capable of responding to the same antigen. |
| Chemokines | A large family of homologous cytokines that promote migration of white blood cells through chemotaxis. |
| Effector cells | Mature, functional T lymphocytes or B lymphocytes that carry out the functions of immune responses. |
| Central tolerance | Destruction of potentially self-reactive T and B cells as they mature in either the thymus or the bone marrow. |
| Chemotaxin | A protein or other substance that acts as a chemical messenger to produce chemotaxis. |
| MHC restriction | The selection of thymocytes that will only interact with the major histocompatibility complex (MHC) antigens found on host cells. |
