Card Set Information
Biology Nerves camturnbull
AQA BIOL5 Nerves
Node of ranvier
What is the function of the cell body?
To store organelles within cytoplasm
What are Dendrons?
Extensions of the cytoplasm of the cell body
Conduct impulses towards the cell body
Sub divided into dendrites which receive impulses from other neurones
What are axons?
Extensions of the cytoplasm of the cell body which conduct impulses away from the cell body
What is the myelin sheath?
A layer that electronically insulates the axon
Formed by Schwann cells
Layers of membranes surround the axon which prevent the movement of charged, water soluble ions
What are Nodes of Ranvier?
Junctions between adjacent schwann cells where the axon is exposed allowing the movement of ions