Final answer:
The membrane potential value other than 0 mV is -20 mV. The resting membrane potential typically ranges from -50 mV to -70 mV and is crucial for cellular function, particularly in neurons and muscle cells, consuming about 25% of a cell's energy.
Step-by-step explanation:
The value of the membrane potential other than 0 mV, regardless of its relationship to the resting potential, is -20 mV (option 3). The resting membrane potential of most cells typically ranges between -50 mV and -70 mV, with -70 mV commonly used as a standard reference. This potential is the result of the different concentrations of ions across the cell membrane, maintained by various membrane proteins, including leakage channels and the Na+/K+ pump.
The membrane potential is crucial for the proper function of cells, especially neurons and muscle cells. It allows for the conduction of electrical signals known as action potentials, which are essential for communication between cells. The maintenance of the resting membrane potential is an energy-consuming process, with about 25% of a cell's energy expended on this task.