Answer:
Antigen
Explanation:
Antigens are present on the outside of the pathogen and trigger the immune system response to send out antibodies, which attach to these antigen structures.
Answer:
Explanation:
Neutralizing pathogens or changed cells is one of the most important tasks of antibodies. To do this, they attach directly to the surface of a virus or bacterium and stop the pathogen from attaching itself to a normal body cell and infecting it. Or the antibody binds to toxins produced by bacteria.