Immune activities defence mechanism for different diseases is known as
Immune action
Immune reaction
First line of defence
Immunity
Match the columns :
Column - $I$ | Column - $II$ |
$(a)$ Physical barrier | $(1)$ skin |
$(b)$ Physiological barrier | $(2)$ interferon protein |
$(c)$ Cellular barrier | $(3)$ leucocytes |
$(d)$ Cytokine barrier | $(4)$ Saliva in the mouth |
$A$ - The vaccines generate memory - $B$ and $T$ - cells. $R$ - In vaccination activated pathogens are introduced into the body.
Colostrum, the yellowish fluid, secreted by mother during the Inittlal days of lactation is very essentlal to impart immunity to the newbom infants because it contains
The thymus is a lobed organ located near the $...A...$ and beneath the $...B... $ The most appropriate combination for $\mathrm{A}$ and $\mathrm{B}$ is
Give differences: $T$-lymphocytes and $B$-lymphocytes