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The following statements are about events during an action potential.A Potassium ions diffuse out across the neurone membrane.B Sodium ions diffuse in across the neurone membrane.C Sodium ion channels open.D Active transport of sodium and potassium ions restores resting potential.E Potassium ion channels open.F Hyperpolarisation of the membrane occurs.(i) Which of the events, A to F, starts depolarisation?Put the correct letter in the box.
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