Oxytocin and vasopressin are transported to neurohypophysis through

Options

A. Blood
B. interstitial fluid
C. axons
D. lymph

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks how oxytocin and vasopressin are transported to the neurohypophysis. The neurohypophysis, also known as the posterior pituitary, is a part of the endocrine system that releases these hormones.

2. **Identifying the Hormones**: Oxytocin and vasopressin are two important hormones produced in the hypothalamus and released into the neurohypophysis. Oxytocin is often associated with love and bonding, while vasopressin is linked to fear and blood pressure regulation.

3. **Role of Neurohypophysis**: The neurohypophysis serves as a storage and release site for these hormones. It is essential to understand that the neurohypophysis is regulated by neurons from the hypothalamus.

4. **Transportation Mechanism**: The question requires us to identify the medium through which these hormones are transported to the neurohypophysis. The options provided are blood, interstitial fluid, axons, and lymph.

5. **Analyzing the Options**:
- **Blood**: While hormones can be transported through blood, oxytocin and vasopressin are specifically synthesized in the hypothalamus and transported to the neurohypophysis.
- **Interstitial Fluid**: This fluid surrounds cells and can facilitate the transport of substances, including hormones, to nearby tissues.
- **Axons**: The hormones are transported along the axons of neurons that extend from the hypothalamus to the neurohypophysis.
- **Lymph**: This is part of the immune system and is not typically involved in hormone transport to the neurohypophysis.

6. **Conclusion**: The correct answer is that oxytocin and vasopressin are transported to the neurohypophysis primarily through **axons**. The hormones travel down the axons of the neurons that project from the hypothalamus to the neurohypophysis.

### Final Answer:
Oxytocin and vasopressin are transported to the neurohypophysis through **axons**.