Myelin Sheath

myelinated axon goes

150m/sec

unmyelinated axon

1m/sec

inside the PNS the bundles of myelinated axons are called

Nerves

the node to node conduction is called

Saltatory conduction

inside the CNS the bundles of myelinated axons are called

Tracts

the myelin sheath covers

around the axon

3rd function of myelin sheath

conserves energy

axon without myelin

electricity go slower

Factors that increase speed of salutatory conduction( with myelin only)

fiber diameter thickness of myelin distance between nodes temperature-warmer-faster

1st function of myelin sheath

insulates the axon = ions cant flow through

the destruction of myelin sheath is called

multiple sclerosis

not every axon has

myelin sheath

axon+myelin=

myelinated axons

myelin sheath is made by

schwan cells and lipid-protein

2nd function of myelin sheath

speeds up nerve=impulse conduction if there's nodes ions can flow in and out through charges