Helper T cells in the immune response
A helper T cell becomes activated by binding to an antigen presented by an APC via the MHCII receptor, causing it to release cytokines. Depending on the cytokines released, this activates either the humoral or the cell-mediated immune response.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Robert Bear and David Rintoul, Adaptive Immunity. December 11, 2013."
http://cnx.org/content/m47434/latest/
OpenStax CNX
CC BY 3.0.