The function of the myelin sheath is to:

1. slow the transmission of action potentials
2. protect the cell from blood borne poisons
3. provide nutrients to the cell
4. speed up the transmission of action potentials along the axon

Predict how the transcontinental railroad will make a difference in the civil war. now, research the inventions of the 19th century. tell what other inventions of the 19th century will change the way people see and remember the war? why?