Give functions of synapse
Functions of synapse
- Ensure unidirectional flow of impulse from neuron to the next.
- Amplifies the impulses by producing sufficient acetylcholine to excite.
- Adaptation or accommodation;
The amount of transmitter substances released by a synapse steadily falls off in the response to constant stimulation until the supply of transmitter substance is exhausted and the synapse is described as fatigued. Further information passing along this pathway is inhibited and the adaptive significance of fatigue in the prevention of damage effect due to over stimulation.
- Integration;
A post synaptic neuron receives stimuli from a variety of source and integrates them and produce a coordinated response.
- Discrimination;
Temporal summation at synapse enable weak background stimuli to be filtered out before it reaches the brain.eg information from receptor in the skin, the eyes and ears receive constant stimuli from the environment which has little immediate importance for the nervous system. Only changes in the intensity of stimuli are significant to the nervous system and these increase the frequency of stimuli and pass across the synapse and evoke a response.
- Inhibition;
The transmission of information across a synapse and neuromuscular function may be prevented post-synaptically by the activity of certain chemical blocking agents or pre-synaptically.
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