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. 

Answered by Emma C. Biology tutor

15768 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What process of chromosome replication is used to produce gametes?


Explain how a change in one amino acid in an enzyme molecule can stop the enzyme working.


How do I test for the presence of starch in food?


What are indicator species and what are they used for?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences