- threshold potential
- the membrane potential that must be achieved before a membrane channel can open; it differs among the various cardiac membrane channels.
Medical dictionary. 2011.
threshold potential
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Threshold potential — The threshold potential is the membrane potential to which a membrane must be depolarized to initiate an action potential.It often can be between −40 and 55 mV, but it can vary based upon several factors. If ion channels are available, that will… … Wikipedia
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potential — 1. Capable of doing or being, although not yet doing or being; possible, but not actual. 2. A state of tension in an electric source enabling it to do work under suitable conditions; in relation to electricity, p. is analogous to the temperature… … Medical dictionary
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