What is the primary function of glial cells?

Glial cells primarily provide structural support in the nervous system. They play a critical role in maintaining the overall health and functionality of neurons, which are responsible for transmitting information. While neurons are involved in sending signals through action potentials, glial cells perform various support functions that are essential for neural communication and maintenance of the environment surrounding neurons.

These functions include protecting neurons, insulating them to enhance communication speed, and supplying nutrients. Glial cells also assist in the removal of waste products and the repair of nervous tissue following injury. By supporting the structural integrity of the nervous system, glial cells ensure that neurons can function optimally, highlighting the importance of their role in overall brain health and communication.

The other options involve functions that are primarily characteristic of neurons or other types of cells, which do not align with the primary role of glial cells.