The complement system is
A) a set of proteins involved in innate but not acquired immunity.
B) a set of proteins secreted by cytotoxic T cells and other CD8 cells.
C) a group of proteins that includes interferons and interleukins.
D) a group of antimicrobial proteins that act together in a cascade fashion.
E) a set of proteins that act individually to attack and lyse microbes.

Question

Quizplus · Accepted Answer

The complement system consists of a series of proteins that work together in a cascade fashion to defend against infection, enhance the ability of antibodies and phagocytic cells to clear pathogens, and promote inflammation.

The Complement System Is