What causes the edema that occurs during the inflammatory process?
Vasodilation
Increased capillary permeability
Emigration of neutrophils
Endothelial cell contraction
The Correct Answer is B
Choice A reason: Vasodilation increases blood flow, causing redness and heat, but doesn’t directly cause fluid leakage. Increased capillary permeability allows fluid to escape into tissues, causing edema, so this is incorrect for the primary cause of inflammatory edema.
Choice B reason: Increased capillary permeability, triggered by inflammatory mediators, allows plasma to leak into tissues, causing edema. This is the primary mechanism during inflammation, making it the correct choice for the cause of edema in the process.
Choice C reason: Neutrophil emigration fights infection but doesn’t directly cause fluid accumulation. Capillary permeability changes lead to edema, so this is incorrect for the cause of swelling in inflammation.
Choice D reason: Endothelial cell contraction contributes to permeability but is a secondary mechanism. Increased capillary permeability is the overarching process causing fluid leakage and edema, so this is less precise and incorrect.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Antibiotics treat bacterial infections, but inspiratory stridor, cough, and tachypnea suggest acute airway obstruction, like croup or bronchospasm. Antibiotics are not immediate for these symptoms, as they address infection, not airway narrowing, making this a lower-priority treatment.
Choice B reason: Sputum culture identifies pathogens but is not urgent for inspiratory stridor, which indicates airway compromise needing immediate relief. Cultures guide long-term therapy, not acute management, making this an incorrect priority for the patient’s presentation.
Choice C reason: Inhaled bronchodilators, like albuterol, are the priority for inspiratory stridor, nonproductive cough, and tachypnea, as they relax airway smooth muscles, relieving bronchospasm or narrowing. This addresses acute airway obstruction, common in conditions like asthma or croup, making it the correct treatment.
Choice D reason: History of illness exposure informs diagnosis but delays treatment for acute airway symptoms. Inspiratory stridor requires immediate intervention to ensure airway patency, making history-taking secondary to addressing the urgent respiratory distress, thus an incorrect priority.
Correct Answer is C
Explanation
Choice A reason: Insufficient mast cell numbers are not a primary cause of impaired healing in older adults. Mast cells contribute to inflammation, but chronic diseases like diabetes disrupt multiple healing pathways more significantly, making this incorrect.
Choice B reason: Circulatory impairment, such as atherosclerosis, can delay healing by limiting oxygen and nutrient delivery. However, it’s often a consequence of chronic illnesses like diabetes, which broadly affect healing, making this less primary than chronic conditions.
Choice C reason: Underlying chronic illnesses, like diabetes or cardiovascular disease, impair inflammation and wound healing in older adults by disrupting immune function, collagen deposition, and perfusion. These prevalent conditions directly impact healing, making this the correct cause.
Choice D reason: Complement and chemotaxis deficiencies occur in specific immunodeficiencies, not commonly in aging. Chronic illnesses like diabetes more consistently impair healing through systemic effects, making this a less likely primary cause.
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