Question

Cellular barriers

a) Provide acquired immunity
b) Provide non specific type of immunity
c) Are a type of leucocytes
d) Are phagocytic in nature
e) Produce interferons

Select the options that are incorrect with respect to cellular barriers

• A. a, c, e
• B. only a
• C. a, d, e
• D. a, e

Answer 1

The correct option is D a, e

Cellular barriers provide non-specific defence mediated by leucocytes like PMNL (Polymorpho nuclear leucocytes), monocytes and natural killer cells.These are phagocytic in nature and they do not produce interferons.

Interferons are cytokine barriers produced by virus infected cells at the time of infection.