Neurones and Synaptic transmission
Types of neurones:
1. Sensory
2. Relay
3. Motor
The diagram below shows each neurones and features of them. For your exam YOU HAVE TO
be able to distinguish between each type of neurone.
Structure of a neurone:
- Cell body includes nucleus with genetic material
- Dendrites carry nerve impulses from other neurones
- Axon carry impulses away from cell body
- Myelin sheath protects axon, speeds up electrical transmission
- Nodes of Ranvier – speed up transmissions by forcing electric impulse to ‘jump’
across the gaps
- Terminal buttons communicate with the next neurone in the chain (synapse)
Types of neurones:
1. Sensory
2. Relay
3. Motor
The diagram below shows each neurones and features of them. For your exam YOU HAVE TO
be able to distinguish between each type of neurone.
Structure of a neurone:
- Cell body includes nucleus with genetic material
- Dendrites carry nerve impulses from other neurones
- Axon carry impulses away from cell body
- Myelin sheath protects axon, speeds up electrical transmission
- Nodes of Ranvier – speed up transmissions by forcing electric impulse to ‘jump’
across the gaps
- Terminal buttons communicate with the next neurone in the chain (synapse)
