Which Statements About the Complement System of Vertebrates Are Correct

Multiple Choice

Which statements about the complement system of vertebrates are correct? (Check all that apply.)

A) The complement system is a part of the immune system of vertebrates.
B) The complement system consists of approximately 30 different proteins that circulate in the plasma.
C) If these proteins encounter the cell wall of a bacteria or fungi they form aggregations and eventually produce a pore that leads to the destruction of the invading cells.
D) Although complement proteins attack invaders,they are not involved with histamine release.
E) The complement system produces antibodies to bind invading cells.