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.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Alcohol can directly suppress the production of red blood cells (erythropoiesis) in the bone marrow, leading to anemia.
B. While alcoholics may indeed be deficient in folate due to poor nutrition, folate deficiency is not the primary mechanism for anemia in alcoholic liver disease.
C. Liver dysfunction can lead to decreased production of clotting factors, contributing to coagulopathy, but it is not the primary mechanism for anemia in alcoholic liver disease.
D. Gastric ulcers may indeed lead to chronic blood loss, contributing to anemia, but it is not specific to alcoholic liver disease.
E. While alcohol-induced inflammation may contribute to various complications, including liver damage, it is not the primary mechanism for anemia in alcoholic liver disease.
Correct Answer is B
Explanation
A. Decreased serum albumin is not typically associated with hemolysis; it may occur in conditions such as liver disease or malnutrition.
B. Jaundice, or yellowing of the skin and eyes, is a common manifestation of hemolysis due to the increased production of bilirubin from the breakdown of red blood cells.
C. Increased serum bilirubin levels occur as a result of hemolysis, contributing to the development of jaundice.
D. Increased bilirubin is essentially the same as increased serum bilirubin; both indicate the presence of jaundice due to hemolysis.
E. Presence of dark urine is also characteristic of hemolysis, as it may contain excess bilirubin, giving it a darker color.
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