Speed in electrical conduction is probably the most important aspect of the nervous system. To propagate the action potential, neurons depend on in channels opening one at a time along the length of an axon. This will slow down the speed in which an action potential is conducted. Myelinating the axons aids in speeding up the propagation time. What two functions does myelination serve? View Available Hint(s) Insulate and remove cell debris Form blood-brain barrier and remove cell debris O Speed up the propagation of action potential and form CSF Insulate and speed up the propagation of action potential