What is the significance of elevated serum levels of troponin?
This intracellular substance can leak into the blood with cardiac cellular injury or death.
Elevated serum levels of troponin occur because of sustained glycogenolysis.
This substance is elevated when a patient has acute tubular necrosis.
Serum elevation of this acute phase reactant occurs because of tissue injury.
The Correct Answer is A
Choice A rationale
Elevated serum levels of troponin indicate cardiac cellular injury or death. Troponin is a protein released into the bloodstream when heart muscle cells are damaged, such as during a myocardial infarction.
Choice B rationale
Sustained glycogenolysis does not cause elevated troponin levels. Glycogenolysis is the breakdown of glycogen to glucose, primarily occurring in the liver and muscles, not related to troponin release.
Choice C rationale
Acute tubular necrosis does not elevate troponin levels. This condition affects the renal tubules and is typically indicated by elevated creatinine and BUN levels.
Choice D rationale
Troponin is not an acute phase reactant. Acute phase reactants are proteins whose levels change in response to inflammation, such as C-reactive protein (CRP), not troponin.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Bacterial infection often leads to an elevated white blood cell count (15,000/mm³) and fever (38.5°C). The body’s immune response to bacterial pathogens results in these clinical manifestations.
Choice B rationale
Viral infections can cause fever, but they typically do not lead to a significant increase in white blood cell count.
Choice C rationale
Fungal infections can cause fever and elevated white blood cell count, but they are less common and usually occur in immunocompromised individuals.
Choice D rationale
Parasitic infections can cause fever and elevated white blood cell count, but they are less common and usually present with other specific symptoms.
Correct Answer is C
Explanation
Choice A rationale
Increased thirst is a symptom of hyperglycemia, not hypoglycemia. It occurs when high blood sugar levels cause dehydration.
Choice B rationale
Increased appetite can occur in hypoglycemia but is not as specific as other symptoms like slurred speech.
Choice C rationale
Slurred speech is a common symptom of hypoglycemia, indicating that the brain is not receiving enough glucose to function properly.
Choice D rationale
Polyuria is a symptom of hyperglycemia, where excess glucose in the blood leads to increased urine production.
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