Match the structure of the central nervous system to the correct description. The functioning cell Select an answer Specialized cells of the nervous system Select an answer Help to form the blood-brain barrier Select an answer The extension of the cell Select an answer NOT SURE CONFIDENT

To match the structure of the central nervous system (CNS) to the correct descriptions, here are the appropriate pairings: 1. **The functioning cell**: Neuron - Neurons are the primary cells responsible for transmitting information throughout the nervous system. 2. **Specialized cells of the nervous system**: Glial cells (or Neuroglia) - Glial cells support and protect neurons and are involved in various functions, including maintaining homeostasis and forming myelin. 3. **Help to form the blood-brain barrier**: Astrocytes - Astrocytes are a type of glial cell that contribute to the formation of the blood-brain barrier, which protects the brain from harmful substances in the bloodstream. 4. **The extension of the cell**: Axon (or Dendrite) - Axons are long extensions that transmit signals away from the neuron, while dendrites are shorter extensions that receive signals. Depending on the context, either could be correct, but typically "axon" is the more common answer for the primary extension. If you have any specific options to choose from, please provide them, and I can help you match them accordingly!