Q. A 56 year-old presents to the emergency room with her first ever seizure. She lacerated her tongue, lost control of her bladder, had violent shaking for a few minutes, and it took her a full day to recover. After a careful work-up, you decide to start her on an antiepileptic drug to stabilize the neuronal membranes and prevent further abnormal depolarization. Which of the following electrolyte leak channel dominates the permeance of neuronal cell membranes?