Plasma Contains ________ Special Proteins That Form the Complement System

Question

Plasma contains ________ special proteins that form the complement system.
A) about 3
B) exactly 10
C) roughly 18
D) exactly 25
E) more than 30

Accepted Answer

Plasma contains more than 30 special proteins that form the complement system, which plays a key role in the immune response by marking pathogens for destruction, among other functions.