A nurse is caring for a client who came to the emergency department reporting chest pain. The provider suspects a myocardial infarction. While waiting for the troponin levels report, the client asks what this blood test will show.
Which of the following explanations should the nurse provide to the client?
Troponin is an enzyme that indicates damage to brain, heart, and skeletal muscle tissues.
Troponin is a heart muscle protein that appears in the bloodstream when there is damage to the heart.
Troponin is a protein that helps transport oxygen throughout the body.
Troponin is a lipid whose levels reflect the risk for coronary artery disease.
The Correct Answer is B
Choice a) is incorrect because troponin is not an enzyme, but a protein. Enzymes are molecules that speed up chemical reactions in the body. Troponin does not have this function.
Choice b) is correct because troponin is a protein that binds to calcium and regulates the contraction of heart muscle fibers. When the heart muscle is injured, such as in a myocardial infarction, troponin leaks into the bloodstream and can be detected by a blood test. The higher the level of troponin, the more severe the damage to the heart.
Choice c) is incorrect because troponin does not help transport oxygen throughout the body. That function is performed by hemoglobin, which is a protein found in red blood cells.
Choice d) is incorrect because troponin is not a lipid, but a protein. Lipids are fats that are used for energy storage and cell membrane formation. Troponin does not have these roles.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","C","D"]
Explanation
Choice A Reason: This is correct because smallpox is a highly contagious and deadly viral disease that can be used as a biological weapon. Smallpox was eradicated in 1980, but some samples of the virus are still stored in laboratories. If released intentionally, smallpox could cause a global pandemic.
Choice B Reason: This is incorrect because hydrogen cyanide is a chemical weapon of mass destruction, not a biological one. Hydrogen cyanide is a colorless gas that interferes with cellular respiration and causes rapid death.
Choice C Reason: This is correct because botulism is a serious and potentially fatal illness caused by a toxin produced by the bacterium Clostridium botulinum. Botulism can be used as a biological weapon by contaminating food or water supplies or by aerosolizing the toxin.
Choice D Reason: This is correct because anthrax is an infection caused by the spore-forming bacterium Bacillus anthracis. Anthrax can be used as a biological weapon by releasing the spores into the air or by contaminating food or water sources.
Choice E Reason: This is incorrect because sarin is a chemical weapon of mass destruction, not a biological one. Sarin is a nerve agent that blocks the transmission of nerve impulses and causes respiratory failure and death.
Correct Answer is B
Explanation
Choice A Reason: This is incorrect because the results are not within the expected reference range. The client's BUN, creatinine, and hematocrit are elevated, indicating dehydration or reduced renal perfusion.
Choice B Reason: This is correct because evaluating urine for amount and for specific gravity can help assess the client's hydration status and renal function. These actions can help assess the client's hydration status and renal function, which may be affected by nausea and vomiting. The client's BUN, creatinine, and hematocrit are elevated, indicating dehydration or reduced renal perfusion. The normal ranges for BUN are 7 to 20 mg/dL, for creatinine are
0.6 to 1.2 mg/dL, and for hematocrit are 38% to 50% for males. The nurse should monitor the urine output and specific gravity, which reflect the concentration and volume of urine. The normal range for urine output is 30 to 60 mL/hour, and for specific gravity is 1.005 to 1.030.
Choice C Reason: This is incorrect because collecting a urine specimen for culture and sensitivity is not indicated for this client. This action is used to diagnose urinary tract infections, which are not suggested by the client's symptoms or results.
Choice D Reason: This is incorrect because decreasing the IV fluid infusion rate and limiting oral fluid intake can worsen the client's dehydration and renal perfusion. The nurse should maintain adequate fluid intake and balance to prevent further complications.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today