Question

Erythropoiesis starts in

• A. Kidney
• B. Liver
• C. Spleen
• D. Red bone marrow

Answer 1

The correct option is D

Red bone marrow

The correct option is D.

Explanation of the correct option:

1. Erythropoiesis is a process to produce red blood cells.
2. Erythropoietin helps to stimulate the red blood cell precursors.
3. Erythropoietin is a hormone secreted by specialized interstitial cells in the kidney. It protects RBCs against destruction and stimulates stem cells of bone marrow to produce more red blood cells.
4. It helps to produce red blood cells in haematopoietic tissues in the red bone marrow.

Explanation of the incorrect options:

Option A:

The kidneys secrete the hormone erythropoietin that stimulates the red blood cell precursors.

Option B:

In the early foetal development, it is started in the yolk sac and then takes place in the liver and spleen.

Option C:

In early foetal development, erythropoiesis starts in the yolk sac and then in the spleen and liver.

Final answer: Erythropoiesis starts in the Red bone marrow.