The cell membrane of the ________ cell contains large amounts of myelin, which insulates the axons and allows them to send nerve impulses quickly.

Cell Membrane

A biological membrane that separates the interior of all cells from the outside environment, controlling the passage of substances in and out of the cell.

Myelin

A fatty substance that forms a sheath around the axons of many neurons, facilitating fast and efficient electrical conduction of nerve impulses.