<prompt> The following are true for T lymphocytes except -Constitute 70 to 80 circulating pool of lymphocytesRelease macrophage inhibition factorSecrete specific antibodiesRelease lymphotoxin  <response>: The adaptive immune system consists of 2 types of lymphocytes: T-cells 70-80 of the adaptive immune force and B cells 10-20 of the adaptive immune force.Antigens triangular shapes above are ingested 1, paially digested 2 and then presented to helper T cells by special cells called macrophages 3. This process activates the helper T cell to release hormones lymphokines that help B cells develop 4. These hormones, along with recognition of fuher antigens 5, change the B cell into an antibody-producing plasma cell 6. The antibodies Y shapes above produced can be one of several types IgG, IgM, IgA, IgE and IgD 7. The antibody fits the antigen much like a lock fits a key. The antigen is thus rendered harmless. The helper T cells also aid in development of cytotoxic T cells 8, which can kill antigens directly; memory T cells are produced 9 so that re-exposure to the same antigen will provide a more rapid and effective response 10. Reff: 