Action potential - A rapid change in the potential difference across the membrane of a neurone, Depolarization - The reversal of the resting potential across the membrane of a neurone, Resting potential - The potential difference across a membrane when a nerve impulse is not being transmitted, Repolarization - The return of the potential difference across the membrane of a neurone following the depolarization of an action potential, Refractory period - A brief period of time during which a neurone cannot generate an action potential, Threshold potential - The potential difference across the membrane of a neurone that must be reached for an action potential to be initiated, Saltatory conduction - The jumping of an action potential from one node of Ranvier to the next, Chemoreceptor - A cell that responds to a chemical stimulus, Receptor potential - A change in the normal resting potential across the membrane of a receptor cell, All-or-none law - Neurones only transmit impulses if the stimulus is sufficient to reach the threshold potential, Voltage-gated channel protein -  Protein that spans the membrane that opens and closes in response to changes in electrical potential across the membrane, Schwann cell - Cell rich in phospholipids which wrap their membranes around the axons of neurones,

AL Nervous communication

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