Question

(a) The barriers in the innate immunity are given in the following table. Identify A, B, C, and D.

	Type of barrier	Barrier
(i)	A	Skin, Mucous membrane
(ii)	Physiological	B, in the eye
(iii)	Cytokine	C
(iv	Cellular	WBC, D

(b) Why sharing of injection needles between two individuals is not recommended?

Answer 1

(a) A – Physical 

B – Lysozyme 

C – Interferon 

D – Natural killer cells

(b) Sharing of injection needles between two individuals can transmit various diseases like AIDS and hepatitis B, as these diseases are transmitted via blood and semen.