these relationships suggest a direct interaction between norepinephrine release from the th-positive nerve terminals and the lymphocytes and macrophages closely associated with them , and focuses attention on the potential neural modulation of related functions such as t and b lymphocyte entry into the spleen and antigen capture ( marginal zone ) , antigen presentation and t cell activation ( pals ) , b cell activation ( parafollicular zone and marginal zone ) , and lymphocyte egress ( outer marginal zone ) .
C0003320
antigen
C1155065
t cell activation