Q. In which one of the following options the two examples are correctly matched with their particular type of immunity?
A) Mucus coating of epithelium lining the urinogenital tract and the HCl in stomach – Physiological barriers
B) Polymorpho-nuclear leukocytes and monocytes – Cellular barriers
C) Anti-tetanus and anti-snake bite injections – Active immunity
D) Saliva in mouth and tears in eyes – Physical barriers
Explanation
[Solution from source] Polymorphonuclear leukocytes (neutrophils) and monocytes are cellular barriers of innate immunity. Mucus coating is a physical barrier, HCl, saliva and tears are physiological barriers, and anti-tetanus and anti-snake venom injections give passive, not active, immunity. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.