Which of the following is a function of astrocytes? A. Astrocytes conduct impulses over long distances. B. Astrocytes build myelin sheaths that surround and insulate axons. C. Astrocytes create the...

Which of the following is a function of astrocytes?
A. Astrocytes conduct impulses over long distances.
B. Astrocytes build myelin sheaths that surround and insulate axons.
C. Astrocytes create the blood–brain barrier.
D. Astrocytes synchronize activity for a group of neurons.