Structurally, neurons are unique because they are the only cells in the body that have :

Options

A. lacunae and canaliculi
B. axons and dendrites
C. satellite cells and neuroglia
D. soma and stroma

Answer

**Step-by-Step Solution:**

1. **Understanding Neurons**: Neurons are specialized cells in the nervous system responsible for transmitting information throughout the body. They are unique in their structure compared to other cell types.

2. **Analyzing the Options**:
- **Option 1: Lacunae**: This option refers to small spaces in bone tissue occupied by osteocytes (bone cells). This is not relevant to neurons.
- **Option 2: Axons and Dendrites**: Neurons possess unique structures called axons and dendrites. Dendrites receive signals from other neurons, while axons transmit signals away from the neuron to other cells.
- **Option 3: Satellite Cells and Neuroglia**: Satellite cells are associated with ganglia in the peripheral nervous system, and neuroglia are supportive cells in the nervous system but are not unique to neurons.
- **Option 4: Soma and Stroma**: The soma refers to the cell body of the neuron, while stroma refers to the supportive tissue in organs, which is not specific to neurons.

3. **Identifying the Correct Answer**: The unique structures that distinguish neurons from other cells in the body are the axons and dendrites. Therefore, the correct answer is **Option 2: Axons and Dendrites**.

4. **Conclusion**: Neurons are structurally unique because they have specialized projections called axons and dendrites, which are essential for their function in transmitting nerve impulses.

---