Identify the barrier of innate immunity in wh | vedclass

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Question

(A) Innate immunity consists of four types of barriers: physical,physiological,cellular,and cytokine barriers.$1$. Physical barriers include skin and

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Cytokine barriers

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(A) Innate immunity consists of four types of barriers: physical,physiological,cellular,and cytokine barriers.$1$. Physical barriers include skin and mucus coatings.$2$. Physiological barriers include acid in the stomach,saliva in the mouth,and tears from eyes.$3$. Cellular barriers include leukocytes like polymorphonuclear leukocytes ($PMNL$-neutrophils),monocytes,and natural killer cells.$4$. Cytokine barriers involve virus-infected cells that secrete proteins called interferons,which protect non-infected cells from further viral infection.Therefore,the correct answer is $A$.

Column-$I$	Column-$II$
$1$. Cellular barrier	$A$. Saliva in the mouth
$2$. Physiological barrier	$B$. Interferons
$3$. Cytokine barrier	$C$. Natural killer (type of lymphocyte)
$4$. Physical barrier	$D$. Mucus coating of the respiratory tract

Identify the barrier of innate immunity in which virus-infected cells secrete proteins called interferons.

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