Glial Cells Have Many Functions and Scientists Are Beginning to Understand

Glial cells have many functions and scientists are beginning to understand that these cells are responsible for more than just "custodial" tasks. According to your textbook, one of the most recent discoveries about glial cells is that

A) there are less glial cells than previously thought.
B) they collect messages from other neurons and send them on to the cell body.
C) there are over 200 types.
D) they can help modulate the amount of neurotransmitter that is released.
E) they are more important than neurons.