Anemia in chronic renal failure (CRF) is due to –
**Core Concept**
In chronic renal failure (CRF), the kidneys' ability to produce erythropoietin (EPO) is impaired, leading to a decrease in red blood cell production. EPO is a hormone that stimulates the bone marrow to produce erythrocytes (red blood cells).
**Why the Correct Answer is Right**
Erythropoietin is produced by the peritubular capillary endothelial cells in the kidneys in response to hypoxia. In CRF, the reduced kidney function leads to decreased EPO production, resulting in anemia. This is a key pathophysiological mechanism underlying anemia in CRF.
**Why Each Wrong Option is Incorrect**
**Option A:** Increased red blood cell destruction is not a primary cause of anemia in CRF. The kidney's inability to produce EPO is the main issue.
**Option B:** Increased erythropoietin production is not seen in CRF; rather, it's decreased.
**Option C:** While inflammation is a component of CRF, it's not the primary cause of anemia in this condition.
**Clinical Pearl / High-Yield Fact**
In CRF, anemia can be treated with recombinant human erythropoietin (rhEPO) to stimulate red blood cell production.
**Correct Answer: C. Inadequate erythropoietin production due to decreased kidney function.**