Imagine an isolated, cave-dwelling species was discovered that used different ions
than other animals to regulate their nervous system signaling. Instead of using
sodium and potassium ions (Na+ and K+), they use lithium and chloride ions (Li+ and
Cl-). They have the same pattern of AP as other animals, with a negative resting
potential, followed by a sharp increase and then a drop in the membrane potential.
Which of these would produce that combination?
