- Messages
- 196
- Reaction score
- 39
- Points
- 38
Brain and spinal cord are the CNS so relay neurone are found in both.
Well it would also be appreciated if someone could explain me what this grey matter is now?(Some background details would be appreciated)
And one more question what is neurone transmitter in detail? `~~~~~~~~~~
The grey matter consists of the cell bodies, dendrites, axon terminals (their cell bodies) of neurons.So it is where there are synapses also. The grey matter is in brain and spinal chord.
When a nerve impulse travels along an axon, when it reaches the end of of the fibre it triggers the nerve ending to release a substance called neurotransmitter.
The neurotransmitter are chemicals. These chemicals diffuse through the synapse. As synapse are not a complete connection between 2 nerves they have a gap in between them, so these chemicals (neurotransmitter) diffuse through/across the gap (the synapse) and bind with second nerve. SO these chemicals stimulate the second neuron to transmit the impulse. This is kind of like a chain, so whenever there is a synapse this process is repeated.