The membrane is permeable to potassium ions but impermeable to sodium ions, regulating their movement.
The membrane is permeable to potassium ions, allowing diffusion, but impermeable to sodium ions, preventing their back-diffusion.
| Front | What is the membrane impermeable and permeable to? |
|---|---|
| Back | Permeable to potassium ions so they can diffuse into neurone Impermeable to sodium ions so they can't diffuse back in. |
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