Learn more: http://www.khanacademy.org/video?v=C_H-ONQFjpQ
How a sodium potassium pump can maintain a voltage gradient across a cell or neuron's membrane

Length: 6 minutes

Correction to Sodium and Potassium Pump Video

Length: 18 minutes

Electrotonic and Action Potentials

Length: 12 minutes

Saltatory Conduction in Neurons