After a neuron fires, the resting potential is re-established by the sodium-potassium pump. random movement of ions. refractory period. electrostatic gradient. EPSPs.
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Step 1: The sodium-potassium pump is responsible for maintaining the resting potential of a neuron. Show more…
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Sample Multiple Choice Question 6: Once an action potential is triggered, the first major chemical change is reversal of the membrane polarity, with the interior of the cell becoming positive. Reversal of the membrane polarity occurs with the interior of the cell becoming negative. There is an increase in the negative charge inside the neuron due to the sodium-potassium pump sending more potassium out of the cell and more sodium into the cell. After an action potential is triggered, the resting potential is restored by the opening of sodium activation gates, the opening of voltage-sensitive potassium channels, and the closing of sodium activation gates. The resting potential is also restored by an increase in the membrane permeability to potassium and chloride ions. Additionally, the delay in the action of the sodium-potassium pump and the refractory period, during which the membrane is hyperpolarized, contribute to the restoration of the resting potential.
Adi S.
During depolarization, the membrane potential is ________.. unchanged becoming more negative becoming more positive wavering up (positive) and down (negative) Net movement of this ion is primarily associated with repolarization. K+ Ca2+ Mg2+ Na+ The ionic concentrations in the interior and exterior of body cells ________. are the same reveal an excess of Na+ ions in the intracellular fluid reveal an excess of Na+ ions in the extracellular fluid reveal an excess of K+ ions in the extracellular fluid When a neuron is in the resting state, ________. both Na+ and K+ leak out of the cell Na+ leaks out of the cell and K+ leaks into the cell Na+ leaks into the cell and K+ leaks out of cell both Na+ and K+ leak into the cell Resting membrane potential is maintained by the sodium-potassium pump, which transports both Na+ and K+ into the cell Na+ out of the cell and K+ into the cell both Na+ and K+ out of the cell Na+ into the cell and K+ out of the cell
Madhur L.
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