UCP2.04 Bad Blood Practice Test

Red blood cells being destroyed faster than they’re produced is what defines hemolytic anemia. In sickle cell disease, the abnormal hemoglobin (HbS) causes red cells to sickle when oxygen is low, making them rigid and fragile. These misshapen cells are easily destroyed by the spleen and in circulation, leading to ongoing hemolysis. Because the body ramps up production to compensate, you see a high reticulocyte count and increased breakdown of heme, which raises bilirubin and can cause jaundice. The overall red cell lifespan drops dramatically—from about 120 days to just days—driving the hemolytic process. Pernicious anemia centers on B12 deficiency affecting DNA synthesis, not premature red cell destruction. Iron overload isn’t a cause of hemolysis itself; it’s a consequence of excess iron. Thalassemia major can involve hemolysis due to defective globin synthesis, but the classic link to rapid red cell destruction is most strongly seen in sickle cell disease.