Which of the following is evidence supporting the hypothesis that the resting potential of a cell is due to potassium diffusion out lowering Na outside the cell, making the membrane potential more negative?
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Which is true about resting membrane potential? This potential is maintained by the unequal distribution of ions on the two sides of the membrane. Potassium is more concentrated inside the cell. Sodium is present in higher concentrations outside the cell. All are true. The sodium-potassium pump plays a role in maintaining the difference of sodium and potassium concentration inside and outside the cell. None.
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Which of the following is most likely to increase the excitability of a neuron? More negative resting membrane potential Decreased extracellular sodium concentration Less negative resting membrane potential Decreased extracellular potassium concentration
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Which of the following statements about resting potential is true? A resting membrane allows much more sodium than potassium to diffuse across. The concentration of sodium is much higher inside the cell than outside. The resting potential exists because of differences in glucose concentration inside and outside the cell. The sodium-potassium pump contributes to the resting membrane potential.
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