4.
Myelin Sheath is an insulator on the axon
Hope that helps! :)
I believe the answer would be B I think sorry in advance if im incorrect
Growth and Maintenance. Share on Pinterest. ...
Causes Biochemical Reactions. ...
Acts as a Messenger. ...
Provides Structure. ...
Maintains Proper pH. ...
Balances Fluids. ...
Bolsters Immune Health. ...
Transports and Stores Nutrients.
A disturbance that repeats over and over