In a resting neurons: The concentration of sodium ion is greater inside the cell than outside. The plasma membrane is completely impermeable to sodium ions. The permeability of the plasma membrane to potassium ions is much greater than its permeability to sodium ions. The plasma membrane is most permeable to sodium ions. The plasma membrane is completely impermeable to potassium ions.
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At rest, the neuron maintains a negative resting membrane potential. This potential is primarily established by the high concentration of potassium ions ($K^+$) inside the cell and the high concentration of sodium ions ($Na^+$) outside the cell. The plasma Show more…
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Though the membrane of a "resting" neuron is highly permeable to potassium (K+) ions, its membrane potential does not exactly match the equilibrium potential for potassium because the neuronal membrane is: A fully permeable to sodium ions. B slightly permeable to sodium ions. C fully permeable to calcium ions. D impermeable to sodium ions. E highly permeable to chloride ions.
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When the membrane is at rest, are the sodium ions more concentrated inside the cell or outside? Where are the potassium ions more concentrated?
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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
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