Equilibrium Potentials For $\mathrm { Na } , \mathrm { K }$

question 19

Short Answer

Equilibrium potentials for $\mathrm { Na } , \mathrm { K }$ , and $\mathrm { Cl }$ are shown. Assume that a cell is permeable to all three ions and has a resting membrane potential of $- 85$ millivolts. Which of the following best describes the net movement of the various ions across the cell membrane by way of passive diffusion?


$\begin{array}{lcl}\underline{\text { Sodium }} &\underline{ \text { Potassium }} &\underline{ \text { Chloride }} \\ \text { a. Inward } & \text { Inward } &{\text { Inward }} \\\text { b. Inward } & \text { Inward } & \text { Outward } \\\text { c. Inward } & \text { Outward } & \text { Inward } \\\text { d. Inward } & \text { Outward } & \text { Outward } \\\text { e. Outward } & \text { Inward } & \text { Inward } \\\text { f. Outward } & \text { Inward } & \text { Outward } \\\text { g. Outward } & \text { Outward } & \text { Inward } \\\text { h. Outward } & \text { Outward } & \text { Outward }\end{array}$

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