LYMPHATIC
LYMPHATIC SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Skin, mucus, hairs and sebaceous secretions all contribute to the effectiveness of which type of nonspecific defense?
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Interferons
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Complement system
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Physical barriers
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Phagocytes
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Explanation:
Detailed explanation-1: -The innate immune system includes physical and anatomical barriers as well as effector cells, antimicrobial peptides, soluble mediators, and cell receptors (Table 1). Skin and mucosa provide an effective immune barrier between the internal and external environment.
Detailed explanation-2: -The mucous membranes lining the nose, mouth, lungs, and urinary and digestive tracts provide another nonspecific barrier against potential pathogens. Mucous membranes consist of a layer of epithelial cells bound by tight junctions.
Detailed explanation-3: -Chemical barriers against infection include enzymes in tears, saliva and mucus that break down the surface of bacteria.
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