Types of synapses
- Created by: Yzyl Quintana
- Created on: 14-02-17 19:05
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- Types of synapses
- Inhibitory synapses
- Makes AP < likely in PO cell
- NT from these synapses opens channels for Cl- & K+ in the PO membrane
- Ions will move through the channels down their diffusion gradients
- Cl- in
- > PD across the membrane as the inside becomes more -ve than usual
- K+ out
- HYPERPOLARISATION
- Makes depolarisation < likely
- More excitatory synapses will be required to depolarise the membrane
- > PD across the membrane as the inside becomes more -ve than usual
- K+ out
- Cl- in
- Ions will move through the channels down their diffusion gradients
- Excitatory synpases
- Make the PO membrane more permeable to Na+
- Several impulses arriving within a short time produce sufficient depolarisation
- Via the release of NT to produce an AP in the PO cell
- Summation
- Temporal
- Several impulses arrive at a synapse having travelled along a SINGLEneurone one after the other
- Combined release of NT generates an AP in the PO membrane
- Several impulses arrive at a synapse having travelled along a SINGLEneurone one after the other
- Spatial
- Impulses are from different synapses (usuallyfrom different neurones)
- Number of different sensory cells stimulated can be reflected in the control of the response
- Impulses are from different synapses (usuallyfrom different neurones)
- Temporal
- Inhibitory synapses
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