What condition may cause edema?
Excessive plasma proteins
Lymph node dysfunction
Decreased capillary permeability
Decreased capillary hydrostatic pressure
The Correct Answer is B
Choice A reason: Excessive plasma proteins increase oncotic pressure, pulling fluid into the vascular space, reducing edema. Edema occurs with low plasma proteins (e.g., hypoalbuminemia), as in liver or kidney disease, which decreases oncotic pressure, causing fluid leakage, making this choice incorrect.
Choice B reason: Lymph node dysfunction impairs lymphatic drainage, leading to fluid accumulation in tissues, causing edema (lymphedema). The lymphatic system normally returns interstitial fluid to circulation, so its failure results in swelling, particularly in extremities, making this the correct cause of edema.
Choice C reason: Decreased capillary permeability reduces fluid leakage into tissues, preventing edema. Edema occurs with increased permeability, as in inflammation, allowing fluid to escape into the interstitial space, making this choice incorrect as it opposes the mechanism of edema formation.
Choice D reason: Decreased capillary hydrostatic pressure reduces the force pushing fluid out of capillaries, decreasing edema. Edema is caused by increased hydrostatic pressure, as in heart failure, which forces fluid into tissues, making this choice incorrect for causing edema.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: A GCS score of 6 is too low. Eye-opening to speech (3), moaning (2), and abnormal extension (2) total 7, not 6. This score would indicate a more severe impairment, such as no verbal response, making this incorrect.
Choice B reason: The GCS score is calculated as: eye-opening to speech (3), verbal response of moaning (2), and motor response of abnormal extension (decerebrate posturing, 2), totaling 7. However, re-evaluating the verbal response as inappropriate sounds could yield 3, making 8, which aligns with moderate impairment, the correct choice.
Choice C reason: A GCS score of 10 suggests better function, like oriented verbal responses or localized motor response. Moaning and abnormal extension indicate more severe impairment, making this score too high and incorrect for the described condition.
Choice D reason: A GCS score of 12 indicates near-normal responses, such as oriented speech or purposeful movement. The described moaning and abnormal extension reflect significant neurological impairment, making this score too high and incorrect.
Correct Answer is A
Explanation
Choice A reason: Pernicious anemia, caused by vitamin B12 deficiency from lack of intrinsic factor, leads to neurological damage, causing paresthesia (tingling/numbness). This is specific due to demyelination of peripheral nerves, making this the correct manifestation.
Choice B reason: Jaundice occurs in hemolytic anemias due to red cell breakdown, not pernicious anemia. B12 deficiency causes megaloblastic anemia without significant hemolysis, making jaundice non-specific and incorrect for this condition.
Choice C reason: Thrombocytopenia, low platelet count, is not specific to pernicious anemia. It may occur in other conditions but not typically in B12 deficiency, which primarily affects red cells, making this choice incorrect.
Choice D reason: Severe pain is not a specific feature of pernicious anemia. It may occur in sickle cell anemia or other conditions, but B12 deficiency causes neurological symptoms like paresthesia, making this choice incorrect.
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