1. Resting state/potential: Is at a polarised state with negatively charged inside and positively charged outside. Not currently firing but has the potential to depending on the next processes.
2. Depolarisation: Stored energy and if stimulated will either reduce (open briefly to let positive ions in) or increase the difference
3. Graded potential: Either depolarised, the charge on the outside and inside become more similar (more likely) or hyperpolarised the charge becomes less similar (less likely) and is cumulatively charges
4. Action potential: When it crosses a threshold, the membrane becomes permeable allowing positive ions to enter changing the action potential, increasing likelihood of it firing that is not cumulative
5. Neurotransmitter: Neuron fires sending message
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