The terms in bold link to topics in the AQA, Edexcel, OCR, WJEC and CCEA A-level specifications, as well as the IB, Pre-U and SQA exam specifications.
The flow of ions across the membrane that encloses a living cell can be modelled as the discharge of a capacitor through a resistor, described by equations for energy storage and exponential discharge. Expressing the small quantities involves manipulating SI units together with their multipliers and prefixes.
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