A 45-year-old presents with hypertension, anorexia, nausea and vomiting, and anemia and is di-agnosed with chronic renal failure. What is the cause of this patient's anemia?
a. Red blood cells being lost in the urine
b. Inadequate production of erythropoietin
c. Inadequate iron absorption in the gut
d. Red blood cells being injured as they pass through the glomerulus
ANS: B
The kidneys are inadequate in their production of erythropoietin; red cells may be lost in the urine, but it is the lack of erythropoietin that leads to anemia. The anemia is not associated with inadequate iron absorption or red cell destruction.
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