Aplastic anemia is a disorder in which the bone marrow cells that develop into mature blood cells become damaged. The damaged bone marrow cells can lead to low numbers of red blood cells, white blood cells, and/or platelets. When the cause of aplastic anemia cannot be diagnosed, the cause is likely which of the following?
Radiation exposure
An autoimmune disorder
Chemotherapy drugs
Toxins
The Correct Answer is B
A. Radiation exposure: Radiation exposure can cause aplastic anemia, but if the cause is unknown, it is less likely to be due to a specific and identifiable event like radiation exposure.
B. An autoimmune disorder: When the cause of aplastic anemia cannot be diagnosed, it is often attributed to an autoimmune disorder where the body attacks its own bone marrow cells.
C. Chemotherapy drugs: Chemotherapy drugs can cause aplastic anemia, but this cause would typically be known based on the patient's medical history.
D. Toxins: Toxins can cause aplastic anemia, but like chemotherapy drugs and radiation, this cause would generally be identifiable.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Hemophilia A: Hemophilia A is caused by a deficiency of factor VIII, leading to problems with blood clotting.
B. Hemophilia B: Hemophilia B is caused by a deficiency of factor IX, not factor VIII.
C. Christmas disease: Christmas disease is another name for Hemophilia B, which is caused by a deficiency of factor IX.
D. Sickle cell disease: Sickle cell disease is a genetic disorder affecting hemoglobin, not a clotting factor deficiency.
Correct Answer is B
Explanation
A. Presence of plethora is a common symptom of polycythemia vera and indicates increased blood volume but is not immediately life-threatening.
B. Calf swelling and pain could indicate a deep vein thrombosis (DVT), which is a serious complication that requires immediate medical attention.
C. A platelet count of 450,000/microL is elevated but not as critical as the possibility of a DVT.
D. Hematocrit of 55% is high, which is expected in polycythemia vera, but it is not as immediately critical as the risk of thrombosis suggested by calf swelling and pain.
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