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NEET 2021 · BiologyPrevious Year Question

Erythropoietin hormone which stimulates R.B.C. formation is produced by

Answer: (B) Juxtaglomerular cells of the kidney. Answer: (b) Juxtaglomerular cells of the kidney Solution: Erythropoietin is the hormone that stimulates erythropoiesis (RBC formation in the red bone marrow); it is secreted mainly by the juxtaglomerular (JG) cells of the kidney in response to low oxygen.

  1. A.The cells of bone marrow
  2. B.Juxtaglomerular cells of the kidney✓
  3. C.Alpha cells of pancreas
  4. D.The cells of rostral adenohypophysis

Correct Answer

(B) Juxtaglomerular cells of the kidney

Solution & Explanation

Answer: (b) Juxtaglomerular cells of the kidney Solution: Erythropoietin is the hormone that stimulates erythropoiesis (RBC formation in the red bone marrow); it is secreted mainly by the juxtaglomerular (JG) cells of the kidney in response to low oxygen. The bone marrow is the site where RBCs are actually made, not the source of the hormone. This is a NEET extension beyond the chapter prose — NCERT only states the site of RBC formation. NCERT: Ch 15, p.194, line 16 — "RBCs are formed in the red bone marrow in the adults."

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