Which of the following is an accumulation and release centre of neurohormones

Options

A. Posterior pituitary lobe
B. Intermediate lobe of the pituitary
C. Hypothalamus
D. Anterior pituitary lobe

Answer

To determine which of the following is an accumulation and release center of neurohormones, we need to analyze the functions of the options given: posterior pituitary lobe, intermediate lobe of pituitary, hypothalamus, and anterior pituitary lobe.

### Step-by-Step Solution:

1. **Understand Neurohormones**: Neurohormones are hormones that are produced by neurons and released into the blood. They play a crucial role in the regulation of various physiological processes.

2. **Identify the Role of the Hypothalamus**: The hypothalamus is a region of the brain that controls the pituitary gland. It produces neurohormones that are transported to the pituitary gland for storage and release.

3. **Examine the Pituitary Gland**: The pituitary gland is divided into different lobes:
- **Anterior Pituitary Lobe**: Produces and secretes various hormones but does not store neurohormones.
- **Posterior Pituitary Lobe**: Stores and releases neurohormones produced by the hypothalamus, such as oxytocin and vasopressin (ADH).
- **Intermediate Lobe**: Primarily involved in the production of melanocyte-stimulating hormone (MSH) and does not play a significant role in neurohormone release.

4. **Conclusion**: The posterior pituitary lobe is responsible for the accumulation and release of neurohormones that are synthesized in the hypothalamus. Therefore, the correct answer to the question is the **posterior pituitary lobe**.

### Final Answer:
The accumulation and release center of neurohormones is the **posterior pituitary lobe**.

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