At Rest, the Membrane Potential Is Nearly the Equilibrium Potential

question 17

Multiple Choice

At rest, the membrane potential is nearly the equilibrium potential for potassium. Why is potassium able to diffuse easily in and out of cells?

• A) Because potassium has a greater concentration in the intracellular fluid (ICF)
• B) Because sodium has a greater concentration in the extracellular fluid (ECF)
• C) Because the resting plasma membrane is more permeable to potassium
• D) Because there is an excess of anions inside the cell