Answer:
The correct option is d. Astrocytes are the most abundant and versatile glial cells, and aid in making exchanges between capillaries and neurons.
Explanation:
Glial cells have the function of protecting neurons and keeping them together, that is, they act as support cells. Among them we find:
Astrocytes are the most abundant glial cells, star-shaped and located in the central nervous system (in the brain and spinal cord). Its function is to maintain an appropriate chemical environment for neurons to exchange information, helping the exchange between neurons and capillaries. In addition, they wrap the capillaries forming part of the blood-brain barrier.
The other options are also glial cells but with different functions:
Microglia: They are extremely small glial cells of the central nervous system, their function is to elicit neuronal wastes and defend or protect the brain from external microorganisms .
Ependymal cells: These are ciliated glial cells of the central nervous system that form the epidendum and cover the ventricles of the brain and the central duct of the spinal cord.
Oligodendrocytes: This type of glial cell involves some neuronal axons, provides support for neuron prolongations and produces myelin.
