The referenced video gives a quick overview about the maintenance of an electrochemical gradient. It discusses the role of ions in the phenomenon of resting membrane potential. Timeline: 00:00 Introduction 00:28 Resting Membrane Potential 00:50 Membrane of a Cell and Ions 01:40 Sodium Potassium Pump 02:06 Charge Differences 03:15 Potassium Channels - Mechanism 03:53 Electrochemical Gradient