Final answer:
Nerve cells in the brain are supported by glial cells, which provide essential nutrients and myelin sheaths for proper neuronal function and communication within the nervous system.
Step-by-step explanation:
The nerve cells in the brain receive life-supporting nutrients and insulating myelin from glial cells.
Nerve cells, or neurons, are the primary components of the nervous system and are essential for transmitting signals throughout the body. These cells are supported by glial cells, which play crucial roles in neuron function and maintenance. In the central nervous system (CNS), oligodendrocytes form the myelin sheath around axons, which insulates them and allows for efficient transmission of electrical impulses. Additionally, other glial cells like astrocytes are responsible for supplying neurons with nutrients and maintaining the extracellular environment.
Glial cells in the peripheral nervous system (PNS) also have critical functions. For instance, Schwann cells are the PNS equivalent to oligodendrocytes in the CNS, creating myelin sheaths around axons. Meanwhile, satellite cells help to nourish neurons and provide structural support. All of these functions of glial cells are vital for the survival, operation, and health of neurons.