Which of the following statements regarding glial cells is false?

A) Glial cells serve as the major supporting tissue in the CNS.
B) Glial cells form part of the blood-brain barrier.
C) Glial cells produce action potentials for skeletal muscles.
D) Glial cells form myelin sheaths around some axons.
E) Glial cells produce cerebrospinal fluid.

Glial Cells

Non-neuronal cells in the central and peripheral nervous system that support and protect neurons.

Blood-Brain Barrier

The blood-brain barrier is a semi-permeable barrier of endothelial cells that prevents most substances in the blood from non-selectively crossing into the brain, protecting it from pathogens and toxins.

Myelin Sheaths

Protective covering made of fat and protein that surrounds nerve fibers, facilitating the rapid transmission of nerve impulses.