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 A
Explanation
Choice A reason: Pulmonary emboli are a priority in ARDS, as they can cause or worsen hypoxemia and lung injury. Emboli block pulmonary arteries, leading to ventilation-perfusion mismatch, a common ARDS trigger, making this the correct condition to assess first.
Choice B reason: Pneumonia may contribute to ARDS but is less urgent than pulmonary emboli, which can rapidly cause life-threatening hypoxia. Emboli are a more immediate concern in ARDS, so this is incorrect.
Choice C reason: Acute pulmonary edema is linked to heart failure, not a primary ARDS cause. Pulmonary emboli directly trigger ARDS’s acute lung injury, making this less critical and incorrect for priority assessment.
Choice D reason: Heart failure may cause pulmonary edema but isn’t a primary ARDS trigger. Pulmonary emboli are a more urgent cause of ARDS-related hypoxia, so this is incorrect.
Correct Answer is C
Explanation
Choice A reason: SIADH causes water retention, not loss, leading to sodium dilution from excess fluid. Sodium dilution and water retention are the effects, so sodium dilution with water loss is incorrect for SIADH’s solute impact.
Choice B reason: SIADH does not cause sodium retention or water loss; it retains water, diluting sodium. The correct effect is sodium dilution with water retention, so this is incorrect for the syndrome’s solute effects.
Choice C reason: SIADH results in water retention due to excess ADH, diluting serum sodium levels (hyponatremia). This sodium dilution and water retention are hallmark effects, making this the correct choice for the solute impact.
Choice D reason: SIADH causes water retention, not sodium retention, leading to diluted sodium. Sodium and water retention would increase sodium levels, which doesn’t occur, so this is incorrect for SIADH effects.
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