Which of the following options is false ?

Options

A. The posterior pituitary is under the direct neural regulation of the hypothalamus
B. Somatostatin from the hypothaiamus inhibits the release of growth (GH) from the anterior pituitary
C. GnRH from the hypothalamus stimulates anterior pituitary to release gonadotrophins
D. None of the above

Answer

To determine which of the following options is false, we need to analyze each statement regarding the functions and relationships of the hypothalamus and the pituitary gland.

### Step-by-Step Solution:

1. **Understanding the Posterior Pituitary Gland**:
- The posterior pituitary gland is indeed under the direct neural regulation of the hypothalamus. This is because the hormones oxytocin and antidiuretic hormone (ADH) are synthesized in the hypothalamus and transported to the posterior pituitary for release.
- **Conclusion**: This statement is true.

2. **Role of Somatostatin**:
- Somatostatin is a hormone released by the hypothalamus that inhibits the release of growth hormone from the anterior pituitary gland. This is a well-established function of somatostatin.
- **Conclusion**: This statement is true.

3. **Gonadotropin-Releasing Hormone (GnRH)**:
- GnRH is released by the hypothalamus and stimulates the anterior pituitary to release gonadotropins, such as follicle-stimulating hormone (FSH) and luteinizing hormone (LH). This is also a correct statement regarding the function of GnRH.
- **Conclusion**: This statement is true.

4. **Identifying the False Option**:
- Since options 1, 2, and 3 are all true, it implies that option 4, which states "none of the above," is the false statement. Therefore, option 4 is the correct answer to the question of which statement is false.
- **Conclusion**: The answer is option 4.

### Final Answer:
The false option is **option 4: none of the above**.

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