Match Each Term with the Most Appropriate Statement

Match each term with the most appropriate statement.
-natural killer cells

A) cells originating from antigen-presenting dendritic cells, activates other lymphocytes in an adaptive immune response
B) cells that directly destroy body cells already infected by viral or fungal parasites, as well as mutant and cancerous cells
C) lymphocytes that are held in reserve, circulate in the bloodstream, and enable a rapid response to subsequent encounters with the same invader
D) coats invading cells to facilitate its phagocytosis; also punctures their cell membrane
E) antibody-manufacturing cells that are produced and mature in the bone marrow
F) able to destroy cells but not dependent on recognition of antigen-MHC complexes
G) a class of proteins that help cells of the immune system communicate
H) "big eaters" that alert other lymphocytes to the invasion of specific antigens
I) lymphocyte that has never bound to an antigen
J) a group of cells that are all produced asexually from one original parent cell
K) surface patterns of nonself molecules or particles
L) proteins released by cytotoxic T cells to destroy target cell membranes
M) preparation injected into the body to elicit a secondary immune response
N) the AIDs virus represses the expression of these