Each neuron maintains a given resting potential across the celfs membrane that a

Question

Each neuron maintains a given resting potential across the celfs membrane that allows the neuron to function properly. What is responsible for maintaining that resting potential, and after an action potential was otserved? o The action poternitial that follows the action potential just observed Apump that moves Na·and K. across the cers membrane by using ATP O Special cels caled gial cels O A pump that alows Ca+ to move out of the cel Channels found in the plasma membrane that are activated by veitae

Explanation / Answer

Answer

A pump that moves Na+ and K+ across the cell membrane by using ATP.

The resting membrane potential of large nerve fibres is about -90 mV.

The active transport of sodium and potassium ions through the membrane by the Na+-K+ ATPase pump that pumps three Na+ ions to the outside of the cell for two K+ ions inside
leaving a net deficit of positive ions on the inside and causing a negative potential inside the cell.

And also leakage of potassium and sodium through the nerve membrane by K+-Na+
"leak" channels which are about 100 times as permeable for potassium than sodium. But these leak channels are always open therefore they do not make a huge impact on the process.

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