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Activation Pathways of the Complement System

19. Innate Immunity / Activation Pathways of the Complement System / Problem 3

Which of the following best describes the role of C3b in the immune system?

A

It directly kills invading pathogens by disrupting their cell membranes.

B

It acts as a signal to recruit neutrophils to the site of infection.

C

It binds to microbial surfaces, facilitating the formation of C3 convertase

D

It serves as a receptor on B cells for antigen recognition.

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