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
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
Threshold — may refer to:Books and comics* Threshold (novel), a 1985 science fiction novel by David R. Palmer * Threshold (Sara Douglass novel), a 1997 fantasy novel by Sara Douglass * Threshold , a 2001 science fiction novel by Caitlín R. KiernanFilm and… … Wikipedia
Threshold voltage — The threshold voltage of a MOSFET is usually defined as the gate voltage where an inversion layer forms at the interface between the insulating layer (oxide) and the substrate (body) of the transistor. The creation of this layer is described next … Wikipedia
Threshold (TV series) — Infobox Television show name = Threshold caption = promotional poster for Threshold format = Science fiction drama runtime = approx. 45 minutes creator = Bragi F. Schut starring = Nowrap|Carla Gugino, Charles S. Dutton Brent Spiner Rob Benedict… … Wikipedia
Threshold price-point — In economics, a threshold price point is the psychological fixing of prices to entice a buyer. The most common example in the United States is the $??.99 phenomenon e.g. setting the price for a good at $9.99. Though it is effectively ten dollars… … Wikipedia
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
Action potential — In physiology, an action potential is a short lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory. Action potentials occur in several types of animal cells, called… … Wikipedia
End-plate potential — Miniature end plate potentials and end plate spikes recorded from muscle fiber End plate potentials (EPPs) (sometimes called end plate spikes ) are the depolarizations of skeletal muscle fibers caused by neurotransmitters binding to the… … Wikipedia
Pacemaker potential — In the heart, the pacemaker potential is the voltage created by impulses from an artificial electronic pacemaker or the SA node which drives the rhythmic firing of the heart.The pacemaker potential brings the membrane potential to the threshold… … Wikipedia
action potential — Physiol. the change in electrical potential that occurs between the inside and outside of a nerve or muscle fiber when it is stimulated, serving to transmit nerve signals. Cf. nerve impulse. [1925 30] * * * Brief (about one thousandth of a… … Universalium
