Sunday, 29 January 2012

2.84 Electrical Impulses

Understand that stimulation of receptors in the sense organs send electrical impulses along nerves into and out of the central nervous system, resulting in rapid responses.

  • The messages that nerves carry are called the nerve impulses and they are electrical signals.
  • They pass along quickly along the axon of the neuron.
  • Some axons have a fatty sheath around them which insulates the axon and allows the impulse to travel faster along the axon.
Diagram showing how it works:




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