Transmission of action potentials

HideShow resource information
  • Created by: Steff06
  • Created on: 03-03-16 17:21
How is an action potential transmitted in myelinated neurones?
The action potential appears to 'jump' from node to node which is known as Saltatory conduction.
1 of 5
Describe the myelin sheath
Myelin sheath is an insulating layer of fatty material. Sodium and potassium ions cannot diffuse through it.
2 of 5
Describe the structure of myelinated neurones
Gaps in myelinated neurones are known as nodes of Ranvier.
3 of 5
Define saltatory conduction
This is where the action potential appears to jump from one node of Ranvier to the next as the myelin sheath acts as an insulator and the action potential cannot be transmitted through this.
4 of 5
What is the advantage of saltatory conduction?
It speeds up transmission of the action potential. It is faster than the transmission in non-myelinated neurones as action potentials can only occur at the nodes of Ranvier
5 of 5

Other cards in this set

Card 2

Front

Describe the myelin sheath

Back

Myelin sheath is an insulating layer of fatty material. Sodium and potassium ions cannot diffuse through it.

Card 3

Front

Describe the structure of myelinated neurones

Back

Preview of the front of card 3

Card 4

Front

Define saltatory conduction

Back

Preview of the front of card 4

Card 5

Front

What is the advantage of saltatory conduction?

Back

Preview of the front of card 5

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Cellular processes resources »