What is the primary function of glial cells in the nervous system?

• A. Transmit electrical impulses
• B. Support and protect neurons
• C. Release neurotransmitters
• D. Form blood-brain barrier

Answer: (B)

Glial cells play a crucial role in the nervous system, primarily through their supportive and protective functions for neurons. Unlike neurons, which are responsible for transmitting electrical impulses and processing information, glial cells provide essential support that enables neurons to function effectively.

One of the key roles of glial cells is to maintain homeostasis, provide structural support, and protect neurons from injury. They facilitate nutrient transport, maintain the extracellular environment, and regulate ion balance, which is vital for neuronal health and function. Glial cells also play roles in modulating neurotransmission and are involved in the repair and scarring processes following injury to neural tissue.

Their supportive functions encompass various types of glial cells, including astrocytes, oligodendrocytes, and microglia, each contributing uniquely to the health and well-being of the nervous system. Thus, the primary function of glial cells is indeed to support and protect neurons, ensuring the overall integrity and functionality of the nervous system.