Which of the following statements regarding complement is true?
A)It is activated by binding to a receptor on an antibody molecule
B)It is activated by contact with collagen on the surface of microbes
C)Activated complement proteins can function as opsonins
D)Both it is activated by binding to a receptor on an antibody molecule and it is activated by contact with collagen on the surface of microbes are true
E)Both it is activated by binding to a receptor on an antibody molecule and activated complement proteins can function as opsonins are true

Question

Quizplus · Accepted Answer

Complement is activated by binding to a receptor on an antibody molecule (classical pathway) and by contact with collagen on the surface of microbes (alternative pathway). Activated complement proteins can function as opsonins, which help phagocytes to engulf microbes.

Which of the Following Statements Regarding Complement Is True