Action potential

• Resting potential


  Neuron is not transmitting action potential and is at rest.

  The inside is more negative than the outside.
• Depolarisation

  A nerve impulse is received from another neuron, sodium goes in making the inside more positive.
• Repolarisation

  Sodium channels close and the potassium channels open and potassium diffuses out of the cell. Making the inside more negative.
• Hyperpolarisation

  Potassium ions channels close more slowly than the sodium channels. Excess potassium ions diffuse out of the neuron.
• Resting potential (II)

  Potassium ions diffuse back in through the leaky ion channels and restores resting potential.