Unmyelinated vs Myelinated

Unmyelinated Transmission

Continuous wave of depolarisation along entire length of axon

Unmyelinated Process

1. Depolarisation in one area

2. Na movement

3. Initiate action potential in next area

4. Repeat

Myelinated Transmission

Action potential jumps from one Node of Ranvier to next

Myelinated Process

1. Ions cannot flow in/out membrane except at Nodes

2. Action potential jumps

3. Faster

Saltatory Conduction

Jumping conduction of nerve impulses from one Node of Ranvier to next increasing transmission speed

2 Ways to Distinguish Stimuli Intensity?

1. Depolarisation of more nerve fibres

2. Produce more nerve impulses in given time