In which of the conditions are all the formed elements of the blood simultaneously depressed?
a. Aplastic anemia
b. Sickle cell anemia
c. Thalassemia major
d. Iron deficiency anemia
ANS: A
Aplastic anemia refers to a bone marrow–failure condition in which the formed elements of the blood are simultaneously depressed. Sickle cell anemia is a hemoglobinopathy in which normal adult hemoglobin is partly or completely replaced by abnormal sickle hemoglobin. Thalassemia major is a group of blood disorders characterized by deficiency in the production rate of specific hemoglobin globin chains. Iron deficiency anemia results in a decreased amount of circulating red cells.
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