Physical barrier = .............. and physiological barrier = .............
Skin, saliva in the mouth
Macrophage, acid in the stomach
Respiratory tract, $PMNL$
Urinogenital tract, $PMNL$
Why is an antibody molecule represented as $H_2I_2$ ?
Which of the following immune responses is responsible for rejection of kidney graft?
Passive immunity can be obtained by injecting
Given below the diagrammatic representation of lymph nodes
Label $A, B$ and $C$
For an organ transplant, it is an advantage to have an identical twin. Why ?