"The absolute refractory period is like a toilet after you've flushed and there's no water in the back of the tank: You can push the handle all you want, but there's no discharge. Once the tank fills to half, you can flush, but its super weak. This is like the relative refractory period. Once the tank is totally full after the last discharge, you can get a good, effective flush once again. This is normal conduction."
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