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The neuron
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Slide 19

 

Saltatory Conduction

The “jumping” of an impulse between the “Nodes of Ranvier” thus dramatically increasing it’s speed.

Only occurs in axons having Myelin.

2m/s  120 m/s

Slide 20

 

All or None Response

If an axon is stimulated above its threshold it will trigger an impulse down its length.

The strength of the response is not dependent upon the stimulus.

An axon cannot send a mild or strong response. It either responds or does not!!!

Slide 21

 

Homework

View ILO 06 – Structure of a Neuron

Complete Activity 1 and 2 (Go to Work)

View ILO 07 – Nerve Tansmission

Answer Q. 2, 4, 5, 7

Explain the critical role Myelin plays to an axon. Include at least two roles it plays.

 

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