Antibodies: Antibodies respond to pathogens in three different ways, direct attack by agglutination, precipitation, or neutralization of antigens, activation of complement, and inflammation; DIrect attacks make antigens more susceptible to phagocytosis, activation of complement causes opsonization, chemotaxis, inflammation, agglutination, neutralization, alteration, or lysis of antigens or antigen-bearing cells, and inflammation is the stimulations of local inflammatory changes in an area, to help prevent spreading of pathogens