Which of the following structures contains groups of neurosecretory cells?

Options

A. Hypothalamus
B. Cerebral cortex
C. Thalamus
D. Piamater

Answer

To determine which of the following structures contains groups of neurosecretory cells, we will analyze each option provided: hypothalamus, cerebral cortex, thalamus, and pia mater.

### Step-by-Step Solution:

1. **Identify the Structures**:
- The options given are hypothalamus, cerebral cortex, thalamus, and pia mater.

2. **Understand the Function of Each Structure**:
- **Hypothalamus**: This is a crucial part of the forebrain. It plays a significant role in hormone production and regulation. It contains groups of neurosecretory cells known as nuclei, which are responsible for producing hormones that regulate the secretion of hormones from the pituitary gland.
- **Cerebral Cortex**: This is also part of the forebrain but is primarily involved in higher brain functions such as sensory perception, motor control, and cognitive functions. It does not contain neurosecretory cells.
- **Thalamus**: Another part of the forebrain, the thalamus acts as a relay station for sensory and motor signals to the cerebral cortex. It does not contain neurosecretory cells.
- **Pia Mater**: This is the innermost layer of the meninges that covers the brain and spinal cord. It serves a protective function and does not contain neurosecretory cells.

3. **Conclusion**:
- Based on the analysis, the hypothalamus is the only structure among the options that contains groups of neurosecretory cells.

### Final Answer:
The correct option is **hypothalamus**.