Match the following barriers of innate immuni | vedclass

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Question

(D) The correct matching is as follows:$1$. Physical barrier: Skin $(A-i)$ acts as a primary physical barrier to prevent the entry of pathogens.$2$. P

Vedclass · Accepted Answer

$A-i, B-iv, C-iii, D-ii$

Vedclass · Answer

(D) The correct matching is as follows:$1$. Physical barrier: Skin $(A-i)$ acts as a primary physical barrier to prevent the entry of pathogens.$2$. Physiological barrier: Saliva in the mouth $(B-iv)$ and acid in the stomach are physiological barriers that prevent microbial growth.$3$. Cellular barrier: Mucus coating $(C-iii)$ is often associated with the lining of respiratory and gastrointestinal tracts, but in the context of cellular immunity, leukocytes like $PMNL$-neutrophils and monocytes act as cellular barriers.$4$. Cytokine barrier: Interferons $(D-ii)$ are proteins secreted by virus-infected cells which protect non-infected cells from further viral infection.Thus, the correct sequence is $A-i, B-iv, C-iii, D-ii$.

List-$I$ (Barrier)	List-$II$ (Example)
$A$. Physical barrier	$i$. Skin
$B$. Physiological barrier	$ii$. Interferons
$C$. Cellular barrier	$iii$. Mucus coating
$D$. Cytokine barrier	$iv$. Saliva in mouth

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

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