A patient with chronic kidney disease experiences increased fatigue and decreased exercise tolerance. Which mechanism explains why erythropoietin deficiency contributes to these symptoms in this patient?

💡 Explanation

Erythropoietin, produced by the kidneys, stimulates red blood cell production in the bone marrow. Because erythropoietin deficiency reduces red blood cell production, anemia results, leading to decreased oxygen delivery to tissues and thus fatigue. Therefore, the correct answer is decreased RBC production, rather than the other options.

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