neurons

• Dendrites


  Recieve signals from other cells
• Cell body


  Keeps the neuron organised
• Nucleus


  Controls the neuron
• Cell membrane


  Protects the cell
• Axon


  Transfers signals to other cells
• Axon hillock


  Connects the neuron to the axon
• Myelin sheath


  increases the speed of impulse transmission
• Node of ranvier


  Allows diffusion
• Schwann cell

  Produces the myelin sheath
• Axon terminal


  Forms junctions with other cells
• Sensory neurons


  Carry nerve impulses from sensory receptors to the spinal cord and brain

  When these nerve impulses reach the brain they are translated into 'sensations' such as vision, hearing, taste and touch.
• Motor neurons


  Directly or indirectly control muscles involved in synapses (contract the muscles when needed)

  When motor neurons are stimulated they release neurotransmitters that bind to receptors on muscles to trigger a response.
• Relay neurons


  Allows motor and sensory neurons to communicate
• Structure of neurons