Specific Defenses of the Host: The Immune Response Innate(nonspecific) Defenses against any pathogen 。Immunity Specific antibody and lymphocyte response to an antigen 。Antigen(Ag) A substances that causes the body to produce specific antibodies or sensitized T cells ·Antibody(Ab) Proteins made in response to an antigen Specific Defenses of the Host: The Immune Response • Innate (nonspecific) Defenses against any pathogen • Immunity Specific antibody and lymphocyte response to an antigen • Antigen (Ag) A substances that causes the body to produce specific antibodies or sensitized T cells • Antibody (Ab) Proteins made in response to an antigen