Question

Which of the following statements regarding different barriers of innate immunity is not correct?

• A. Acid present in the stomach, saliva in the mouth, tears from the eyes prevent the growth of microorganisms and constitute physiological barriers of our body
• B. Mucus membrane lining the respiratory, gastrointestinal and urogenital tracts helps in trapping the microbes and constitute physiological barriers of our body
• C. Certain types of leucocytes such as polymorpho-nuclear leucocytes (PMNL-neutrophils) and lymphocytes such as natural killer cells, constitute cellular barriers of our body
• D. Virus infected cells secrete proteins called interferons which protect non-infected cells from further viral infection and constitute cytokine barriers of our body

Answer 1

The correct option is B Mucus membrane lining the respiratory, gastrointestinal and urogenital tracts helps in trapping the microbes and constitute physiological barriers of our body

Physical barriers provide a physical block against pathogens from entering the body. Mucus membrane lining the respiratory, gastrointestinal and urogenital tracts helps in trapping the microbes and constitutes physical barriers of our body.