Neurons
- Created by: ashbrook.niamh
- Created on: 10-03-20 09:14
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- Neurons
- definitions
- nucleus= stores the DNA, controls the centre of the cell
- dendrite= receives the nerve impulse of signal from adjacent neurons
- axon= where the electrical signals pass along
- myelin sheath= protects the axon from the external influences that might effect the transmission of the nerve impulse
- nodes of ranvier= speed up transmission of impulse by forcing it to jump
- terminal buttons= send signals to adjacent cells
- types of neurons
- motor neuron
- function is to carry messages from the CNS to effectors e.g muscles/ glands
- length= short dendrites, long axons
- relay neuron
- function is to transfer messages from sensory neurons to other inter connecting neurons or motor neurons
- length= short dendrites, short and long axons
- sensory neurons
- function is to carry messages from the PNS to the brain and spinal cord
- length= long dendrites and short axons
- motor neuron
- definitions
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