Complement is Activated By

Question

Complement is activated by
A)an immune antibody.
B)phagocytes.
C)antigen-antibody complexes.
D)natural antibodies.
E)all of the above.

Accepted Answer

Complement is primarily activated by the binding of complement proteins to antigen-antibody complexes. While phagocytes and natural antibodies can also activate complement to a certain extent, they do not play as significant a role in complement activation as antigen-antibody complexes.