Oxytocin and vasopressin synthesised in hypothalamus and reach to posterior pituitary by the way of

Options

A. Anterior pituitary gland
B. Portal circulation
C. Blood vessels
D. Axons of hypothalamic neuron

Answer

To solve the question regarding how oxytocin and vasopressin (also known as antidiuretic hormone, ADH) synthesized in the hypothalamus reach the posterior pituitary, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Synthesis Location**:
- Oxytocin and vasopressin are synthesized in the hypothalamus. Specifically, they are produced in two nuclei: the paraventricular nucleus (PVN) primarily produces oxytocin, while the supraoptic nucleus (SON) primarily produces vasopressin.

2. **Transport Mechanism**:
- After synthesis, these hormones need to be transported to the posterior pituitary gland for storage and release. The question asks how this transport occurs.

3. **Identifying the Transport Pathway**:
- The hormones are transported along the axons of hypothalamic neurons. The neurons that synthesize these hormones extend their axons down to the posterior pituitary.

4. **Conclusion**:
- Therefore, the correct answer to the question is that oxytocin and vasopressin reach the posterior pituitary via the axons of hypothalamic neurons.

### Final Answer:
Oxytocin and vasopressin synthesized in the hypothalamus reach the posterior pituitary by the way of **axons of hypothalamic neurons**.

---