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Biology 15 Online
OpenStudy (carniel):

Which term is used to collectively describe foreign substances like bacteria, viruses, and other pathogens that trigger an immune response?Select one of the options below as your answer: A. Antibodies B. Antigens C. Antibiotics

OpenStudy (anonymous):

The closest to the truth is antigens - strictly speaking they are foriegn proteins or frgaments of foriegn proteins that have been broken up by the immune system and antigens presented by MHC (major histocompatibility complex) to trigger a response

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