Question
_____ are barriers to pathogens at body surfaces.a. Intact skin and mucous membranesb. Tears, saliva, and gastric fluidc. Resident bacteriad. All are correct
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The innate immune system is the body's first line of defense against pathogens. It is a non-specific defense mechanism that comes into play immediately or within hours of a pathogen's appearance in the body. It does not produce memory cells and is always present Show more…
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__________ are nonspecific defenses against threats. a. Intact skin and mucous membranes b. Tears, saliva, gastric fluid c. Resident bacteria d. Urine flow e. all of the above
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_____ is/are the first line of defense against threats. a. Skin, mucous membranes b. Tears, saliva, gastric fluid c. Urine flow d. Resident bacteria e. a through f. all of the above
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