’Pathogens' are also known as
Immune bodies
Antigens
Agglutinins
Autotoxins
The yellowish fluid "colostrum" secreted by mammary glands of mother during the initial days of lactation has abundant antibodies ($lgA$) to protect the infant. This type of immunity is called as
Give differences: $T$-lymphocytes and $B$-lymphocytes
The principle function of the lymph node in the man is
‘First line of defence' is known as
Select the correct pair
Column $- I$ | Column $- II$ |
$(A)$ Physiological barrier | $(1)$ Skin |
$(B)$ Cellular barrier | $(2)$ Macrophages |
$(C)$ Physical barriers | $(3)$ interferons |
$(D)$ Cytokine barriers | $(4)$ Tears |
$(5)$ Mucus |