Action Potential 0.0 / 5 ? BiologyAction PotentialA2/A-levelOCR Created by: Hannah BickerstaffCreated on: 13-09-13 09:33 What potential is a small depolarisation caused by sodium ions entering the cell? Generator 1 of 8 Achieved when the membrane is depolarised to a value of about +40mV Action Potential 2 of 8 What does a polarised membrane have across it? Potential Difference 3 of 8 What potential is a potential difference across the membrane of about -50mV? Threshold 4 of 8 What happens when a membrane looses its resting potential? Depolarises 5 of 8 The condition of a membrane that is more highly polarised than the usual resting state. Hyperpolarised 6 of 8 After each action potential it is impossible to stimulate the cell membrane to reach another action potential, what is this period known as? Refractory 7 of 8 Term used to describe the movements of ions along the neurone. Local Current 8 of 8
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