Neuro 105 Action Potential Gated Channels

At rest

Voltage gated sodium potassium channels are closed

Threshold

Activates voltage gated sodium channels, potassium channels remain closed

Rising Phase

Sodium enters the voltage gated sodium channels, potassium channels remain closed

Falling Phase

Voltages gated sodium channels inactivate and potassium channels open

Undershoot

Voltage gated potassium channels close and sodium channels become inactive (refractory period) and close