NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Dilation & increase of permeability of small blood vessels, constriction of the bronchi, & mucus production
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dilation of small blood vessels; constriction of the bronchi; chemotaxis of leukocytes
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increases chemotaxis & phagocytosis, stimulate other cells to secrete inflammatory cytokines, induce fever
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dilate or constrict blood vessels, stimulates inflammation & pain
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-attracts monocytes/macrophages, neutrophils, T-lymphocytes & eosinophils via chemotaxis
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Detailed explanation-1: -Histamine is an active substance found in a large range of living organisms that plays a major role in allergic reaction, dilating blood vessels and increasing the permeability of vessel walls.
Detailed explanation-2: -Histamine causes constriction of various smooth muscles with the bronchioles being most sensitive to its effects. It also commonly produces vasodilation as a result of effects on vascular smooth muscle. Histamine also has multiple effects on the heart and nervous systems.
Detailed explanation-3: -For these people, histamine builds up in the body and is not broken down correctly. This can trigger an immune system response resulting in symptoms such as diarrhea, shortness of breath, headaches, or skin irritation.