Which of the following roles do glial cells NOT perform?

Glial cells, also known as neuroglia, perform a variety of essential functions in the nervous system, but they do not conduct electrical impulses. Instead, their primary roles include cleaning up debris, providing structural support, and forming barriers like the blood-brain barrier, which protects the brain from harmful substances.

In contrast to neurons, which are specialized cells that transmit electrical signals and facilitate communication within the nervous system, glial cells serve supportive and maintenance functions. Neurons generate and propagate electrical impulses, but glial cells assist in maintaining an optimal environment for these processes to occur, ensuring that neurons can function effectively. Therefore, the distinguishing feature of glial cells is their role in support rather than direct involvement in the electrical signaling that is characteristic of neurons.