What is the role of neuroglia in the nervous system?

• A. Transmit impulses
• B. Connect the CNS to the body
• C. Support and protect neurons
• D. Conduct sensory information

Answer: (C)

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