Which of the following statements regarding glial cells is false?
A. Glial cells form part of the blood-brain barrier.
B. Glial cells produce action potentials for skeletal muscles.
C. Glial cells form myelin sheaths around some axons.
D. Glial cells serve as the major supporting tissue in the CNS.
E. Glial cells produce cerebrospinal fluid.
Answer: B
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