The skin and mucous membrane act as which typ | vedclass

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(B) Innate immunity consists of four types of barriers: $1$. Physical barriers: Skin and mucous membranes prevent the entry of microorganisms into the

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Physical

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(B) Innate immunity consists of four types of barriers: $1$. Physical barriers: Skin and mucous membranes prevent the entry of microorganisms into the body. $2$. Physiological barriers: Acid in the stomach,saliva in the mouth,and tears from eyes prevent microbial growth. $3$. Cellular barriers: Certain types of leukocytes (WBCs) like $PMNL$-neutrophils and monocytes,and macrophages in tissues,phagocytose and destroy microbes. $4$. Cytokine barriers: Virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection. Therefore,skin and mucous membranes are classified as physical barriers.

The skin and mucous membrane act as which type of barrier in innate immunity?

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