Synthesize the role of C3 convertase in the activation of immune responses across all three complement pathways.

C3 convertase forms a membrane attack complex in the alternative pathway only.

C3 convertase is unique to the lectin pathway and does not interact with other pathways.

C3 convertase cleaves C3 into C3a and C3b in all pathways, leading to opsonization, cell lysis, and inflammation.

C3 convertase only functions in the classical pathway to recruit antibodies.