Certified Surgical Technologist (CST) Practice Exam

What role do neuroglia serve in the nervous system?

1. Produce CSF

2. Support and bind

3. Conduct impulses

4. Initiate reflexes

The correct answer is: Support and bind

Neuroglia, also known as glial cells, play a critical supportive role in the nervous system. They are essential for maintaining homeostasis, providing structural support, and protecting neurons. Neuroglia outnumber neurons in the brain and serve various functions that contribute to the overall functionality of the nervous system. One of their primary roles is to provide support and bind neurons together, ensuring that the neuronal architecture is stable and functional. They help in the repair and maintenance of neurons, facilitate nutrient transfer, and assist in the removal of waste products. Additionally, certain types of neuroglia, such as astrocytes, can modulate synaptic activity and contribute to the blood-brain barrier, thereby influencing neuronal signaling and environment. While the production of cerebrospinal fluid (CSF) is a function attributed to specific types of neuroglia, such as ependymal cells, it does not encompass the sole or primary role of neuroglia as a whole. Conducting impulses is the primary function of neurons, not neuroglia. Likewise, the initiation of reflexes is primarily a function associated with neuronal pathways rather than glial support. Therefore, the best understanding of neuroglia emphasizes their supportive and binding role within the nervous system.