A patient with acute myelogenous leukemia (AML) asks the nurse why their bones are making more white blood cells when they already have so many. The nurse clarifies that the large number of leukemic white cells they have:
attempt to take over the function of the abnormal white blood cells.
will help to protect them against infection.
are larger in size than normal white blood cells and clog the bone marrow.
are not as effective as normal white cells to protect against infection.
The Correct Answer is D
Choice A reason: This is not a correct explanation for the large number of leukemic white cells. Leukemic white cells are abnormal white blood cells that do not function properly. They do not attempt to take over the function of the abnormal white blood cells, but rather crowd out the normal ones.
Choice B reason: This is also not a correct explanation for the large number of leukemic white cells. Leukemic white cells do not help to protect against infection, but rather increase the risk of infection. They impair the immune system's ability to fight off bacteria, viruses, and other pathogens.
Choice C reason: This is a partially correct explanation for the large number of leukemic white cells. Leukemic white cells are larger in size than normal white blood cells, and they can clog the bone marrow. This can interfere with the production of other blood cells, such as red blood cells and platelets. However, this is not the only reason for the large number of leukemic white cells.
Choice D reason: This is the best explanation for the large number of leukemic white cells. Leukemic white cells are not as effective as normal white cells to protect against infection, because they are immature and dysfunctional. They do not respond to signals from the immune system, and they do not recognize or destroy foreign invaders. They also prevent the normal white cells from doing their job.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: This is correct. Folic acid deficiency causes macrocytic, normochromic anemia, which means that the red blood cells are larger than normal, but have normal color and hemoglobin content. Folic acid is a vitamin that is needed for the synthesis of DNA and the maturation of red blood cells.
Choice B reason: This is incorrect. Microcytic, hypochromic anemia means that the red blood cells are smaller than normal and have less color and hemoglobin content. This type of anemia is caused by iron deficiency, not folic acid deficiency.
Choice C reason: This is incorrect. Normocytic, normochromic anemia means that the red blood cells are normal in size, color, and hemoglobin content, but there are fewer of them. This type of anemia is caused by blood loss, hemolysis, or bone marrow failure, not folic acid deficiency.
Choice D reason: This is incorrect. Microcytic, normochromic anemia means that the red blood cells are smaller than normal, but have normal color and hemoglobin content. This type of anemia is rare and is caused by disorders of red blood cell production, such as thalassemia or sideroblastic anemia, not folic acid deficiency.
Correct Answer is B
Explanation
Choice A reason: Decreasing intracranial pressure with decerebrate posturing is not the correct answer. Decerebrate posturing is a sign of severe brain damage that involves the extension and outward rotation of the arms and legs, and the arching of the back. It is not associated with decreasing intracranial pressure, but rather with increased pressure or brainstem compression.
Choice B reason: Increasing intracranial pressure with decorticate posturing is the correct answer. Decorticate posturing is a sign of severe brain damage that involves the flexion of the arms at the elbows and the extension of the legs. It is associated with increased intracranial pressure or lesions in the cerebral hemispheres.
Choice C reason: Decreasing intracranial pressure with decorticate posturing is not the correct answer. Decorticate posturing is a sign of severe brain damage that involves the flexion of the arms at the elbows and the extension of the legs. It is not associated with decreasing intracranial pressure, but rather with increased pressure or lesions in the cerebral hemispheres.
Choice D reason: Increasing intracranial pressure with decerebrate posturing is not the correct answer. Decerebrate posturing is a sign of severe brain damage that involves the extension and outward rotation of the arms and legs, and the arching of the back. It is associated with increased intracranial pressure or brainstem compression, but it is not the posture described in the question.
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