Question: A 42 year old woman decides to lose weight on a diet prescribed by an anorexic friend. She loses about 30 pounds in 45 days, but her serum potassium level falls to 2.1 mmol/L (normal: 3.5 to 5.0 mmol/L). Which of the following changes is most likely to occur in this young woman?

A. Depolarization of the resting membrane potential

B. Hyperpolarization of the resting membrane potential

C. Increased intracellular potassium concentration

D. Potassium equilibrium potential becomes less negative