Structure and function of neurons

• What are the 3 types of neurons

  • Sensory
  • Relay
  • Motor
• Describe the structure of a neuron:

  • Cell body contains nucleus and has dendrites
  • Axon covered in myelin - a sheath divided by nodes of Ranvier
• Describe electrical transmission:

  When a neuron is activated by a stimulus, the inside becomes positively charged for a split second causing an action potential to occur. This creates an electrical impulse that travels down the axon towards the end of the neuron