Which statement is FALSE regarding the function of an astrocyte?

A. Astrocytes assist in the uptake of excess neurotransmitter in the synaptic cleft.

B. Astrocyte end feet line blood vessels in the central nervous systems to form a protective barrier.

C. Gap junctions in astrocytes are formed from a single connexin that allows for the releases of gliotransmitters (e.g. glutamate) into the synaptic cleft.

D. In response to injury, astrocytes transition to a reactive state where they can swell in size potentially forming a scar.