Nervous System A&P Practice Test

Neuroglia, also known as glial cells, play a vital role in the nervous system by supporting and protecting neurons. These cells are not involved in the transmission of impulses like neurons are; rather, they provide essential support functions that are crucial for maintaining the overall health and efficiency of the nervous system.

Neuroglia perform various functions including the following:

1. **Structural support**: They help maintain the shape and organization of nervous tissue, forming a framework that holds neurons in place.

2. **Protection**: Glial cells contribute to the blood-brain barrier, which protects neurons from potentially harmful substances in the bloodstream.

3. **Nutrient supply**: They assist in supplying nutrients to neurons and also help in the removal of waste products from neuronal metabolism.

4. **Insulation**: Certain types of glial cells, like oligodendrocytes and Schwann cells, are responsible for the formation of myelin, which insulates axons and enhances the speed of electrical impulse transmission.

5. **Support during injury**: Neuroglial cells play a critical role in the repair process following nervous system injuries, helping to facilitate the healing and regeneration of neuronal tissue.

In contrast to glial cells, options