Neurons and Neurotransmission

• role of sensory neurones

  • carry nerve impulses from receptors to the spinal cord and brain
• role of relay neurons

  • found in the brain and spinal cord and allow sensory and motor neurons to communicate
• role of motor neurons

  • control muscle movement
  • when motors are stimulated they release neurotransmitters that bind to the receptors on muscles to trigger a response, which lead to movement
• describe synaptic transmission

  • action potential passed down axon of the neuron
  • reaches pre-synaptic neuron where synaptic vesicles containing neurotransmitters are stimulated to fuse with the pre-synaptic membrane
  • neurotransmitters are released across the synaptic gap
  • neurotransmitter bind to complementary receptor sites on the post synaptic neurone which stimulates the post-synaptic neurone