Which of the following is not a function of astrocytes?
a) support and brace neurons
b) anchor neurons to blood vessels
c) guide the migration of young neurons, synapse formation, and to determine capillary permeability
d) control the chemical environment around neurons
e) provide the defense for the cns

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.

c should be the answer