A complement component that is strongly chemotactic for neutrophils is:
Immunology ·Previously asked in JKSSB Veterinary Pharmacist 2025
View the full solved paper: JKSSB Veterinary Pharmacist – 2 March 2025
Question
A complement component that is strongly chemotactic for neutrophils is:
- A. C3
- B. C3b
- C. C5a (Correct answer)
- D. C5b
Correct Answer
Option C — C5a
Detailed Solution & Explanation
The correct answer is C5a.
Key Points
- C5a is a potent chemotactic factor that attracts neutrophils to the site of infection/inflammation. C3b acts as an opsonin.
- C5b initiates the membrane attack complex (MAC).
Topics covered: Complement System C5a Neutrophils