Action+Potential+9

= Basics: = = = = Sodium ions go into the cell and the electrical potential becomes more positive. = = Potassium ions move out of the cell and the electrical potential becomes more negative. = = A resting ion is positive on the outside where NA+ is found, the inside is negative where K+ is found .= = = = How it works: = = 1. Stimulus opens NA+ channels in the cell membrane allowning NA+ to flow into the cell, this causes resting potential to rise. (depolarization) = = 2. K+ channels open allowing K+ to flow out of the cell. This causes the charge of the cell to become negative. (repolarization) = = = = All or None = = = = For a neuron to produce an action potential, the cell body has to reach a threshold voltage. Once it does it will fire completely. = = = =[] <- Action potential explanation and animation.= = = =[] <- Another explanation and animation with narrarated step by step=