Which of the following secretes hormones with the help of neurosecretory axons ?

Options

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

Answer

To solve the question "Which of the following secretes hormones with the help of neurosecretory axons?", we will analyze each option provided:

1. **Understanding Neurosecretory Axons**:
- Neurosecretory axons are specialized neurons that secrete hormones into the bloodstream. These axons typically originate from the hypothalamus and extend to other glands.

2. **Analyzing Each Option**:
- **Option A: Pineal Gland**:
- The pineal gland secretes melatonin but does not utilize neurosecretory axons for its hormone secretion. It is primarily regulated by light and dark cycles.

- **Option B: Adrenal Cortex**:
- The adrenal cortex secretes hormones like cortisol and aldosterone. Its secretion is regulated by tropic hormones from the pituitary gland, not directly by neurosecretory axons.

- **Option C: Anterior Pituitary**:
- The anterior pituitary secretes various hormones, but it is regulated by hypothalamic hormones that travel through the bloodstream rather than through neurosecretory axons.

- **Option D: Posterior Pituitary**:
- The posterior pituitary gland secretes hormones such as oxytocin and vasopressin (ADH), which are produced in the hypothalamus and transported down neurosecretory axons to be stored and released into the bloodstream.

3. **Conclusion**:
- Based on the analysis, the correct answer is **Option D: Posterior Pituitary**, as it is the gland that secretes hormones with the help of neurosecretory axons.

### Final Answer:
**Option D: Posterior Pituitary**