試題詳解

29. Clonal selection
(A) determines the pool of mature leukocytes that will be stimulated by macrophages.
(B) requires the activation of natural killer cells.
(C) describes the proliferation of B and T lymphocytes after they have been activated by an antigen.
(D) requires the presence and activation of complement.
(E) describes the selection of mature non-self T cells.