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(B) Innate immunity consists of four types of barriers:$1$. Physical barriers: Skin and mucus coating of the respiratory,gastrointestinal,and urogenit

Vedclass · Accepted Answer

$A-4, B-2, C-1,5, D-3$

Vedclass · Answer

(B) Innate immunity consists of four types of barriers:$1$. Physical barriers: Skin and mucus coating of the respiratory,gastrointestinal,and urogenital tracts prevent the entry of microorganisms $(C-1, 5)$.$2$. Physiological barriers: Acid in the stomach,saliva in the mouth,and tears from eyes prevent microbial growth $(A-4)$.$3$. Cellular barriers: Certain types of leukocytes like polymorphonuclear leukocytes ($PMNL$-neutrophils),monocytes,and macrophages can phagocytose and destroy microbes $(B-2)$.$4$. Cytokine barriers: Virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection $(D-3)$.Therefore,the correct matching is $A-4, B-2, C-1,5, D-3$.

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

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

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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