Which statement about the complement system is true?

Question

Quizplus · Accepted Answer

The complement system is a part of the immune system that enhances (complements) the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism, promote inflammation, and attack the pathogen's cell membrane. It consists of a number of small proteins found in the blood, generally synthesized by the liver, and normally circulating as inactive precursors. When stimulated by one of several triggers, proteases in the system cleave specific proteins to release cytokines and initiate an amplifying cascade of further cleavages. The end result of this activation cascade is the production of the membrane attack complex, which forms a pore in the membrane of the target cell, leading to cell lysis and death.

Which Statement About the Complement System Is True