Physiology X, Y and Z are three permeable ions. If at resting potential, X and Y are – 50 and – 30 respectively. What is the value of Z? A 20 B -20 C 80 D -80 💡 Explanation X, Y and Z are three permeable ions. If at resting potential, X and Y are - 50 and - 30 respectively. What is the value of Z? ✓ Correct Answer: C. 80