1. Action Potential’s Propagation

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Explain the propagation of action potential along the axon of neurone

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Biology

action potential

axon

coordination

120 fois fait

Helmina Kmrzmn

Malaysia

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Compléter 1. Action Potential’s PropagationVersion en ligne Explain the propagation of action potential along the axon of neurone par Helmina Kmrzmn 1 potential open active sodium repolarised depolarisation positively higher closed pump open threshold influx potassium functioning Action potential is controlled by electrical difference between the inner and outer axon membranes . This difference is due to the differences of sodium and ions concentrations . During resting potential , sodium ion concentration is on the outside of the membrane . Sodium ion is pumped out by the - potassium via transport . Voltage - gated sodium channels are all , therefore preventing any sodium ions from reentering the axon . When a stimulus is present , sodium - potassium pump stops . Voltage - gated sodium channels start to . This allows sodium ions to flow into the axon . This causes the voltage if the inner membrane to be more positive - this is called the . As the potential value is achieved , more sodium ions enter the axon , causing a sodium . This will proceed to the generation of an action potential . Sodium ions will flow to the next region of the axon . This will cause an action potential to be generated in the next region of the axon . Meanwhile , as the inner membrane is charged and the outer is negatively charged , voltage - gated potassium channels start to . Potassium ions diffuse out of the axon , causing the axon membrane to be .