Why is it possible for potassium to diffuse easily into and out of cells?
A) Potassium has a greater concentration in the intracellular fluid (ICF).
B) Sodium has a greater concentration in the extracellular fluid (ECF).
C) The resting plasma membrane is more permeable to potassium.
D) An excess of anions are inside the cell.

Question

Quizplus · Accepted Answer

Because the resting plasma membrane is more permeable to K⁺ than to Na⁺,K⁺ can easily diffuse from its area of higher concentration in the ICF to its area of lower concentration in the ECF.Because Na⁺ and K⁺ are both cations,the net result is an excess of anions inside the cell,resulting in the resting membrane potential.The remaining options do not correctly identify the process that most easily diffuses K⁺.

Why Is It Possible for Potassium to Diffuse Easily into and Out