Threshold potential

  The threshold potential is the membrane potential to which a membrane must be depolarized to initiate an action potential.

Product highlight

Ultra pure water for precise laboratory analyses and reliable

Two instruments in one compact solution for demanding samples

ERP industry solution for recipe and process-oriented production

It often can be between −40 and -55 mV, but it can vary based upon several factors. If ion channels are available, that will move the potential in the direction of the equilibrium potential for that ion:

• sodium ion channel: Na+ is approximately +60mV
• potassium channel: K+ is approximately -95mV
• chloride channel: Cl- is approximately -70mV

Therefore, resting ion channel for sodium will depolarize and thus excite, while channels for potassium or chloride will hyperpolarize and thus inhibit.