Chapter 42, Problem 6TY

Which of the following contribute(s) to the resting membrane potential?

1. a. the relative leakiness of the membrane to Na⁺ and K⁺
2. b. active transport of ions across the membrane
3. c. concentration of Na⁺ and K⁺ inside and outside of the cell
4. d. all of the above
5. e. b and c only