Describe the structure and function of the myelin sheath?

The myelin sheath is a fatty substance which surrounds and insulates neuron axons (i.e. it does not allow potassium or sodium ions to pass through it), which allows fast propagation of action potentials along neurones in the nervous system. Action potentials instead 'jump' along the axon, by a process known as saltatory conduction.  This makes passing information in both the central and peripheral nervous system faster and more efficient. 

EC
Answered by Emma C. Biology tutor

16741 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Explain how change in blood flow to a runner's muscles helps him to run.


Sophie accidentally puts her hand on an open flame, she immediately withdraws her hand. This is an example of a reflex reaction. Describe how a reflex reaction is coordinated.


Describe the reflex arc from the point of a receptor detecting a stimulus.


Describe the process of Translation?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning