Question

A(n) _____ is a layer of fat cells that encases and insulates many axons, and helps electrical signals travel faster down the axon

Answer 1

The right answer is Schwann cells.

Schwann cells, or neurolemmocytes, are peripheral glial cells. With oligodendrocytes, they make myelin sheaths around the axons of neurons, protecting them and increasing the speed of electric nerve impulses.