What is the function of glial cells?

Glial cells play a crucial role in the nervous system primarily by supporting and protecting neurons. Unlike neurons, which are responsible for transmitting signals and communicating information, glial cells provide essential support functions. They help maintain the homeostasis of the neural environment, supply nutrients to neurons, remove waste products, and contribute to the repair and regeneration of neural tissues after injury. Additionally, glial cells can also facilitate communication among neurons by modulating the transmission of signals, ensuring that the overall health and efficiency of the nervous system is maintained.

In contrast, generating electrical impulses for neuron firing is a specific function of neurons themselves, as they are the cells that create and transmit action potentials. Transmitting sensory signals is also a task performed directly by neurons, particularly sensory neurons that respond to external stimuli. While some glial cells may be involved in the neurotransmitter cycle, not all of them release neurotransmitters solely, as their roles are more diverse and extend beyond this function.