Out of the following hormones, how many are secreted from adenohypophysis?
[Prolactin, ADH , GH, LH, Aldosterone, MSH, Melatonin, PTH]

Options

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

Answer

To determine how many hormones from the given list are secreted by the adenohypophysis (anterior pituitary gland), we will analyze each hormone one by one.

1. **Prolactin**: This hormone is indeed secreted by the adenohypophysis. It plays a crucial role in lactation and breast development.

2. **ADH (Antidiuretic Hormone)**: This hormone is not secreted by the adenohypophysis. Instead, it is produced in the hypothalamus and released from the posterior pituitary (neurohypophysis).

3. **GH (Growth Hormone)**: This hormone is secreted by the adenohypophysis. It is essential for growth, cell repair, and metabolism.

4. **LH (Luteinizing Hormone)**: This hormone is also secreted by the adenohypophysis. It is important in regulating the menstrual cycle and ovulation in females.

5. **Aldosterone**: This hormone is not secreted by the adenohypophysis. It is produced by the adrenal cortex and is involved in regulating sodium and potassium levels.

6. **MSH (Melanocyte-Stimulating Hormone)**: This hormone is secreted by the intermediate lobe of the pituitary gland, not the adenohypophysis.

7. **Melatonin**: This hormone is secreted by the pineal gland, which is located in the brain. It regulates sleep-wake cycles.

8. **PTH (Parathyroid Hormone)**: This hormone is secreted by the parathyroid glands, which are located near the thyroid gland. It plays a critical role in calcium metabolism.

Now, summarizing the findings:
- Hormones secreted by the adenohypophysis: Prolactin, GH, and LH.
- Total: 3 hormones.

Thus, the answer to the question is **3**.