Can you explain the movement of ions and ion channel activity during.pdf

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Can you explain the movement of ions and ion channel activity during the resting and action potential? Solution Action potential is the potential due to the which the impulse is passed from one neuron to another. Resting stage - in resting stage the inside has higher concentration of Potassium ions ie (-ve) sign,wheareas the outside it has high concentration of Sodium ions ie (+ve) ions..!! The membrane is slightly permeable to Sodium ions to transport the Sodium outside maintaining the concentration outside and inside.. Action potential - during this this the membrane becomes much more permeable to Sodium ions which allows the huge of Sodium inside the neuron in a short time making the charge opposite direction with comparison to outside.. The Potassium ions moves outside of the neuron thus creating action potential....

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Define relative refractory period Solution Relative refractory period is a phase of action potential.It is the time period during ehich a stronger than normal stimulus is required to bring about an action potential. Right after the action potential has moved down the axon,there is a time interval during which it is difficult for a neuron to send another signal,this time period is called relative refractory period.After the absolute refractory period,sodium chanels become to recover from inactivation and if during this time period a stronger stimuli is given it can cause the generation of an action potential.During relative refractory period continuous potassium ions flow out of the cell. Therefore sodium channel inactivation and higher than resting pk values are responsible for relative refractory period.

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