ion channels to open allowing K+ ions to move out of the postsynaptic neurone into the synapse - As Cl- ions diffuse in and K+ ions diffuse out of the postsynaptic neurone this makes it more negative inside than its normal resting potential; it -->
becomes hyperpolrised - It is less likely a new action potential will be created as a larger influx of sodium ions would be needed to depolarise the membrane to create an action potential
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