A molecule or praticle recognized by the body as nonself is a(an)
A) antibody.
B) antigen.
C) complement.
D) macrophage.
E) phagocyte.

Question

Quizplus · Accepted Answer

An antigen is a molecule or particle recognized by the body as nonself and will typically trigger an immune response. Antibodies are proteins produced by the immune system in response to antigens, but are not considered antigens themselves. Complement, macrophages, and phagocytes are all part of the immune system, but they are not specifically molecules or particles recognized as nonself.

A Molecule or Praticle Recognized by the Body as Nonself