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Question

(D) The correct matching is as follows:$(A)$ Physical barriers: Skin $(4)$ acts as the primary physical barrier preventing the entry of pathogens.$(B)

Vedclass · Accepted Answer

$4, 3, 2, 1$

Vedclass · Answer

(D) The correct matching is as follows:$(A)$ Physical barriers: Skin $(4)$ acts as the primary physical barrier preventing the entry of pathogens.$(B)$ Physiological barriers: Tears $(3)$ (along with acid in the stomach and saliva in the mouth) prevent microbial growth.$(C)$ Cellular barriers: Leukocytes $(2)$ (such as $PMNL$-neutrophils and monocytes) phagocytose and destroy microbes.$(D)$ Cytokine barriers: Interferons $(1)$ are proteins secreted by virus-infected cells which protect non-infected cells from further viral infection.Therefore,the correct sequence is $A-4, B-3, C-2, D-1$.

Column-$I$	Column-$II$
$(A)$ Physical barriers	$(1)$ Interferon
$(B)$ Physiological barriers	$(2)$ Leukocytes
$(C)$ Cellular barriers	$(3)$ Tears
$(D)$ Cytokine barriers	$(4)$ Skin

Match the following columns:

Column-$I$ Column-$II$

$(A)$ Physical barriers $(1)$ Interferon

$(B)$ Physiological barriers $(2)$ Leukocytes

$(C)$ Cellular barriers $(3)$ Tears

$(D)$ Cytokine barriers $(4)$ Skin

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Match the following columns: Column-$I$ Column-$II$ $(A)$ Physical barriers $(1)$ Interferon $(B)$ Physiological barriers $(2)$ Leukocytes $(C)$ Cellular barriers $(3)$ Tears $(D)$ Cytokine barriers $(4)$ Skin