Refractory period 0.0 / 5 ? BiologyNervous systemA2/A-levelWJEC Created by: rhiannonCreated on: 15-10-13 19:53 What happens once an action potential is reached? Sodium ion channels close preventing any further influx of sodium ions 1 of 5 Potassium ion channels ______ and potassium ions flow back ______ the axon Open, into 2 of 5 Membrane is now Repolarised 3 of 5 Temporary overshoot of _______ Potassium ions 4 of 5 During this period an action potential _______ Cannot be created 5 of 5
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