Erythropoietin is released by

Options

A. pituitary gland
B. pancreas
C. Adrenal gland
D. kidney

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks where erythropoietin is released from. Erythropoietin is a hormone involved in the production of red blood cells (RBCs).

2. **Identify the Function of Erythropoietin**: Erythropoietin plays a crucial role in erythropoiesis, which is the process of producing red blood cells in the body.

3. **Consider the Options**: The options provided are:
- Pituitary gland
- Pancreas
- Adrenal gland
- Kidneys

4. **Analyze Each Option**:
- **Pituitary Gland**: This gland is responsible for secreting several hormones such as growth hormone, thyroid-stimulating hormone, and others, but it does not secrete erythropoietin.
- **Pancreas**: The pancreas produces hormones like insulin and glucagon, but it does not produce erythropoietin.
- **Adrenal Gland**: This gland secretes hormones like adrenaline and noradrenaline, but not erythropoietin.
- **Kidneys**: The kidneys are known to secrete erythropoietin, especially in response to low oxygen levels in the blood.

5. **Conclusion**: Based on the analysis, the correct answer is that erythropoietin is released by the kidneys.

**Final Answer**: Erythropoietin is released by the kidneys.

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