PPT Slide
At rest, inner environment has a higher concentration of K, the outer environment has a high Na concentration. The neuron’s cell membrane has active Na/K gates. When an impulse comes in contact with the membrane, it turns off the gate.[polarized]
Na rushes in, K leaves and the electrical impulse passes through the cell body. [wave of depolarization]
After the electrical impulse leaves, the gates are turned back on, and Na is pumped out - K reenters the cell
3 Na pumped out for every 2 K pumped in [repolarization]