Match List I with List II
| LIST I | LIST II |
|---|---|
| A. Mucus lining | I. Physiological barrier |
| B. Acid in the stomach | II. Cellular barrier |
| C. PMNL-neutrophils | III. Physical barrier |
| D. Interferons | IV. Cytokine barrier |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A-III, B-I, C-II, D-IV
A. Mucus lining — this matches III. Physical barrier. Mucus of the respiratory, gastrointestinal and urogenital tracts traps microbes.
B. Acid in the stomach — this matches I. Physiological barrier. Acid kills microbes entering with food.
C. PMNL-neutrophils — this matches II. Cellular barrier. These leucocytes engulf microbes.
D. Interferons — this matches IV. Cytokine barrier. Virus-infected cells secrete interferons that protect other cells.