the na/k pump helps a muscle cell maintain a state of
Na+/K+-ATPase The Na+/K+-ATPase helps maintain resting potential, effect transport, and regulate cellular volume.[2] It also functions as a signal transducer/integrator to regulate MAPK pathway, ROS, as well as intracellular calcium. In most animal cells, the Na+/K+-ATPase is responsible for about 1/5 of the cell's energy expenditure.[citation needed] For neurons, the Na+/K+-ATPase can be responsible for up to 2/3 of the cell's energy expenditure.[3]