Helper T cells stimulate the B cell via the binding of CD40L at the T cell to CD40 on the B cellular, thru interaction of different TNF-TNF-receptor circles of relatives ligand pairs, and by way of the directed release of cytokines.
Helper T cells do now not directly kill inflamed cells, as cytotoxic T cells do instead, they help spark off cytotoxic T cells and macrophages to attack inflamed cells, or they stimulate B cells to secrete antibodies.
Helper T cells no longer immediately kill infected cells, as cytotoxic T cells do. as a substitute they assist activate cytotoxic T cells and macrophages to assault inflamed cells, or they stimulate B cells to secrete antibodies.
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