The correct answer is: E) provide the defense for the CNS
Astrocytes are star-shaped cells found in central nervous system (brain and spinal cord) .Some of their functions include:
• Support of neurons by supporting endothelilal cell of blood–brain barrier,
• Provide nutrients to neurons
• Maintain ion balance and thus controlchemical environment around neurons
• Repair of injuries in the brain
• the secretion or absorption of neural transmitters…
The cells that provide the defense for the CNS are called microglia. Those cells are also glial cells, derived from macrophages and thus, part of active immune defense.
The option that is not a function of astrocytes is E. provide the defense for the CNS.
It should be noted that astrocytes are vital as they support and brace neurons. They're also helpful as they anchor neurons to blood vessels.
Also, astrocytes guide the migration of young neurons, synapse formation, and help to determine capillary permeability and control the chemical environment around neurons.
Astrocytes do not provide the defense for the CNS.
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