Microbiology 9th Edition by Laura Black, Jacquelyn Black

تمرين 29

Which of the following is NOT true about B cells?
(a) B cells develop from lymphoid stem cells in the bone marrow and mature in the bone marrow.
(b) Humoral immunity is mediated by B cells and their an tibodies.
(c) Functional B cells are found in all tissues except lym phoid tissues (lymph nodes, spleen, adenoids, and gut- associated tissues).
(d) B cells produce and release antibodies when stimulated by an antigen.
(e) B cells are most effective in defending the body against foreign substances outside of cells, such as bacterial tox ins, bacteria, and viruses before they enter cel