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Species resistance means
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Each species develops disease that are unique to it and do not develop diseases that are unique to other species
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Species resistance is due to the fact that
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Microorganisms vary from one species to another
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Viral peritonitis
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In cats--doesn't affect humans--b/c of difference in basal temperaturesan example of species resistance
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Humans are resistant to malaria and tuberculosis that affect __________
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Birds
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Skin and mucous membrane lines the passageway of
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Respiratorydigestiveurinaryreproductive systems
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Skin and mucous membranes create
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Mechanical barriers
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_____, ________, and ________ traps infectious agents and ___________
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HairMucusSweatrinse away pathogens
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Hair, mucus, and sweat are known as
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First line of defense
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The epidermis of skin sloughs off cells, removing
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Bacteria as it does so
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Frequent hand washing helps increase
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Effectiveness of the mechanical barrier provided by the skin
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Pepsin is an
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Enzyme
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Pepsin is found in
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Gastric juice
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______ in tears is a chemical barrier
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Lysosome (not lysozyme)
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Chemical barriers
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Pepsin (gastric juice)Low pH (stomach)lysosome (tears)Salt (perspiration)Interferons
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Interferons are
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Hormone-like peptides
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