What is one function of the most abundant cell type in the central nervous system?

The most abundant cell type in the central nervous system (CNS) is glial cells, specifically astrocytes, which play a crucial role in supporting neurons. Their functions include maintaining the blood-brain barrier, regulating blood flow, providing metabolic support, and helping in the repair and scarring process following neural injury. By providing this essential support, glial cells ensure that neurons can function effectively and efficiently, making their supportive role critical to the overall health and functionality of the CNS.

While some of the other answer choices refer to important functions carried out by different cell types, they do not represent the primary function of the most abundant cell type in the CNS. For example, neurons are responsible for transmitting electrical signals, but glial cells specifically focus on support. Only certain glial cells, such as oligodendrocytes, produce myelin sheaths, and hormones are not typically generated by CNS cells but rather by endocrine glands.