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Nervous system :zap: (PNS: Peripheral nervous system (Impulse follow the…
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Impulse
The outside of the Axon is positively charged when in resting, due active transport pushing sodium ions out into the inter cellular fluid , with the insides of the axon is negatively charged
When an impulse is generated, the sodium gates of the axon open, and the sodium that had been pushed out diffuses in, causing the inside to become positive and the outer becomes negatively charged.
After a few milliseconds, the sodium gates close, and the potassium gates open, and potassium diffuses out, then the inside becomes negatively charged, This is called repolarisation
There is an excess of positive of positive ions outside, which leads to the diffusion of ions in and out, causing the axon to regain it's resting potential