The initiation of a humoral immune response involves a complex interaction of the antigen, cells and intercellular messengers. Which of the following statement(s) concerning the initiation of the humoral immune response is/are correct?
A.	Helper T lymphocytes stimulate B lymphocytes through secretion of cytokines such as interleukin 4 and 6
B.	A number of cells can aid in presenting the antigen to the helper T cell including B lymphocytes and macrophages
C.	All antigens require coordinated efforts of the various cellular components of the immune system
D.	An antigen must be a living microorganism
Answer:A
The initiation of a humoral immune response involves a complex interaction of the antigen, cells and intercellular messengers. Which of the following statement(s) concerning the initiation of the humoral immune response is/are correct?
A.	Helper T lymphocytes stimulate B lymphocytes through secretion of cytokines such as interleukin 4 and 6 B.	A number of cells can aid in presenting the antigen to the helper T cell including B lymphocytes and macrophages C.	All antigens require coordinated efforts of the various cellular components of the immune system D.	An antigen must be a living microorganism