How many of the following hormones were synthesised and secreted by pituitary gland ?
* growth hormone
* prolactin
* thyroxine
* aldosterone
* luteinizing hormone
* follicle - stimulating hormone

Options

A. Two
B. Four
C. Six
D. One

Answer

To determine how many of the listed hormones are synthesized and secreted by the pituitary gland, we will analyze each hormone one by one.

1. **Growth Hormone (GH)**:
- This hormone is produced and secreted by the anterior pituitary gland. It plays a crucial role in growth, metabolism, and body composition.
- **Conclusion**: Yes, synthesized and secreted by the pituitary gland.

2. **Prolactin (PRL)**:
- Prolactin is also produced by the anterior pituitary gland. It is primarily responsible for stimulating milk production in mammals.
- **Conclusion**: Yes, synthesized and secreted by the pituitary gland.

3. **Thyroxine (T4)**:
- Thyroxine is produced by the thyroid gland, not the pituitary gland. It regulates metabolism and is crucial for growth and development.
- **Conclusion**: No, not synthesized by the pituitary gland.

4. **Aldosterone**:
- Aldosterone is a hormone produced by the adrenal glands. It plays a key role in regulating sodium and potassium levels in the body.
- **Conclusion**: No, not synthesized by the pituitary gland.

5. **Luteinizing Hormone (LH)**:
- Luteinizing hormone is produced by the anterior pituitary gland. It is involved in regulating the menstrual cycle and ovulation in females, and testosterone production in males.
- **Conclusion**: Yes, synthesized and secreted by the pituitary gland.

6. **Follicle-Stimulating Hormone (FSH)**:
- Follicle-stimulating hormone is also produced by the anterior pituitary gland. It is essential for the development of eggs in females and sperm production in males.
- **Conclusion**: Yes, synthesized and secreted by the pituitary gland.

Now, let's summarize the findings:

- Hormones synthesized and secreted by the pituitary gland:
- Growth Hormone (GH)
- Prolactin (PRL)
- Luteinizing Hormone (LH)
- Follicle-Stimulating Hormone (FSH)

Total count: **4 hormones** are synthesized and secreted by the pituitary gland.

### Final Answer:
**4 hormones** are synthesized and secreted by the pituitary gland.