Neurons of embryo, neurons of retina and cerebral cortex of the adult differ with one another in

Options

A. Number of axons
B. Nature of axons
C. Number of dendrites
D. Nature of dendrites

Answer

**Step-by-Step Solution:**

1. **Identify the Types of Neurons**:
- Neurons can be classified based on their structure, specifically the number of processes (extensions) that extend from the cell body.

2. **Neurons of the Embryo**:
- The neurons in the embryo are typically **unipolar neurons**. This means they have only one extension, which serves as both the axon and the dendrite.

3. **Neurons of the Retina**:
- The neurons found in the retina are **bipolar neurons**. These neurons have two extensions: one dendrite and one axon.

4. **Neurons of the Cerebral Cortex**:
- The neurons in the cerebral cortex are known as **multipolar neurons**. These neurons have one axon and multiple dendrites, allowing for more complex connections.

5. **Comparison of Neurons**:
- The key difference among these types of neurons lies in the **number of dendrites**:
- Unipolar neurons (embryo) have one process.
- Bipolar neurons (retina) have two processes.
- Multipolar neurons (cerebral cortex) have many dendrites.

6. **Conclusion**:
- Therefore, the main difference between the neurons of the embryo, retina, and cerebral cortex is the **number of dendrites** they possess.

**Final Answer**: The neurons of the embryo, retina, and cerebral cortex differ in the number of dendrites.

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