Final answer:
Potassium and calcium ions are higher in concentration inside the cell compared to outside.
Step-by-step explanation:
The ion(s) that is/are higher in concentration inside the cell compared to outside are potassium and calcium. In the resting state, potassium ions (K+) are concentrated inside the cell, while sodium ions (Na+) are more concentrated outside the cell.
This concentration gradient is maintained by sodium-potassium pumps in the cell membranes, which actively transport sodium out of the cell and potassium into the cell. This helps to generate and maintain the resting membrane potential of the cell.