- Created by: Alexandra Smith
- Created on: 05-12-11 12:02
The Roles of Synapses
Transmission of stimulus in the correct direction.
Convergence - (Things coming together).
*Different inputs lead to the same output/response.
Spacial Summation - Many presynaptic neurones.
*Single input - not enough sodium to reach threshold.
*All - contribute to reaching an action potential in the post synaptic neurone.
Temporal Summation -
* One presynaptic neurone.
* Requires a series of action potentials.
* Two postsynaptic neurones - one to the brain, the other to the spinal cord.
Acclimatisation - 'Over time you get used to it'
*Caused by synaptic fatigue. Run out of vesicles of neurotransmittor - acetyl choline.