Steps of Neurophysiology By Mikaela Aldenhoven
Polarised membrane /resting potential = more negatively charged ions inside the cell and more positively charged ions outside the cell in the extracellular fluid
Stimuli (neurotransmitter) causes gates in cell membrane to open slightly
Sodium trickles into the cell
When the inside of the cell reaches its threshold, the sodium gates open wider and sodium rushes into the cell causing depolarisation
The sodium diffuses through the cytoplasm of the axon and another action potential is created at the adjacent node (node to node)
Sodium gates close and potassium gates open
Potassium diffuses out of the cell to the extracellular fluid
The neuron is polarised again (resting potential)
The sodium potassium pump transports sodium out and potassium into the cell
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