4. You create an artificial cell containing pure water inside a phospholipid mem

Question

4. You create an artificial cell containing pure water inside a phospholipid membrane, and then insert ion channels into the membrane that are equally permeable to K', and Cl. You drop the cel into a 1-liter beaker containing a solution with 100 mM K7, 50 mM Cl-, and 50 mM A (a nonpenetrating anion). In the final steady state that is reached: a. The membrane potential would be b. The K+ concentration inside the cell would be c. The Cl concentration inside the cell would be (positive or negative?) than 100 mM. (greater or less?) than 50 mM. (greater or less?)

Explanation / Answer

a. Th membrane potential would be negative as a non penetrating anion is present outside the cell.

b. The potassium concentration inside the cell will be less than 100mM

C. The chloride concentration inside the cell would be less than 50mM.

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