Secrection of which of the following is under neurosecretory nerve axons?

Options

A. Pineal
B. Adrenal cortex
C. Anterior pituitary
D. posterior pituitary

Answer

To solve the question regarding which secretion is under neurosecretory nerve axons, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which secretion is controlled by neurosecretory nerve axons. This implies we need to identify the gland or structure that releases hormones through nerve axons.

2. **Identify the Options**: The options provided are:
- Pineal gland
- Adrenal cortex
- Anterior pituitary
- Posterior pituitary

3. **Analyze Each Option**:
- **Pineal Gland**: This gland secretes melatonin and is primarily regulated by light exposure, not directly by neurosecretory axons.
- **Adrenal Cortex**: This part of the adrenal gland produces corticosteroids and is regulated by hormones from the pituitary gland, not directly by neurosecretory axons.
- **Anterior Pituitary**: This gland releases various hormones that regulate other glands but is not directly controlled by neurosecretory nerve axons.
- **Posterior Pituitary**: This structure stores and releases hormones such as oxytocin and vasopressin (ADH), which are produced in the hypothalamus and transported down the axons of neurosecretory neurons.

4. **Conclusion**: Since the posterior pituitary is the only option that is directly involved in the secretion of hormones (oxytocin and vasopressin) through neurosecretory nerve axons, it is the correct answer.

5. **Final Answer**: The secretion under neurosecretory nerve axons is from the **posterior pituitary** (Option 4).