What Is the Pathophysiologic Process in Hemolytic-Uremic Syndrome

What is the pathophysiologic process in hemolytic-uremic syndrome?

A) An autoimmune disorder in which immunoglobulin A (IgA) coats erythrocytes that are destroyed by the spleen and remnants are excreted through the kidneys.
B) Verotoxin from E.coli is absorbed from the intestines and damages erythrocytes and endothelial cells.
C) Endotoxins from E.coli block the erythropoietin produced by the kidneys,which reduces the number of erythrocytes produced by the bone marrow.
D) Failure of the nephron to filter urea increases the blood urea nitrogen,which binds to erythrocytes that are subsequently destroyed by the spleen.

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