The chemotactic factor is______________?
Correct answer: D. C5a
- A. C2a
- B. C3b
- C. C4a
- D. C5a
Explanation
C5a is the strongest chemotactic complement fragment and attracts neutrophils and other leukocytes to sites of inflammation. C3b mainly acts as an opsonin, whereas C2a and C4a are not the principal chemotactic factors.
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