Anaphylaxis causes the immune system to release a flood of chemicals that can cause you to go into shock — blood pressure drops suddenly and the airways narrow, blocking breathing.
Anaphylactic reactions are triggered by the cross-linking of the high-affinity IgE receptor by receptor-bound IgE that recognizes antigens such as food, drug, or insect venom antigens.
The mechanism of anaphylaxis is mediated primarily by antibodies—specifically those of the immunoglobulin E (IgE) class.
I hope this be short answers like you want and hope it help you :)
