Depolarization

(redirected from depolarize)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

depolarization

[dē‚pō·lə·rə′zā·shən]
(electricity)
The removal or prevention of polarization in a substance (for example, through the use of a depolarizer in an electric cell) or of polarization arising from the field due to the charges induced on the surface of a dielectric when an external field is applied.
(optics)
The resolution of polarized light in an optical depolarizer.

Depolarization

 

the decrease in the difference in potentials during the resting state (so-called resting potential) between the internal and external sides of the membrane of a living cell. In nerve cells and their processes, as well as in muscle fibers, depolarization is one of the most important components of the process of excitation. Stable depolarization may occur experimentally or in certain diseases as a result of direct damage to the membrane or disruption of metabolism.

References in periodicals archive ?
by high-frequency synaptic input) the repeated activation of AMPA receptors will depolarize the postsynaptic neuron sufficiently to allow for ion current to flow through NMDA receptors.
2+] can depolarize the membrane by entering the cell, and the anion [Cl.
Ach is then broken down and inactivated by the enzyme acetylcholinesterase (AChE), allowing the muscle fiber to depolarize.
Polarization cells are similar to zinc grounding cells in that as AC depolarizes the internal plates it can lower the back voltage, which may compromise the operation of the cathodic protection system.
Potasyum kanallati; Hipoksik uyan ile pulmoner arter duz kas hucrelerinde Kv (voltaj bagimli potasyum kanallari) inhibisyonu ile memran depolarize olurve voltaj bagimli kalsiyum kanallan acihr.
Since cold neutrons will depolarize in a liquid deuterium target in which the scattering cross section is much larger than the absorption cross section, it will be necessary to quantify the loss of polarization before capture.
If the CP potential is more positive, the pipe is allowed to depolarize, and we check for a 100 mV polarization shift.
Stimulation above a certain threshold causes an area of the nerve cell's membrane to reverse its resting electric charge, or depolarize, as positive sodium ions rush into the negatively charged cell.
Taken together, the PSD will enable laboratory researchers and industry technicians to depolarize excitable cells in a highly targeted and readily reproducible manner significantly extending the breadth and depth of experimental protocols, as well as enabling high throughput testing, sample screening, and drug discovery.
One hypothesis is that exposure to certain allelochemicals depolarize some plant root cell membranes (2).
03% by weight that can depolarize the neutron beam by spin-flip scattering by an unpaired electron.
The QT interval represents the amount of time the heart's electrical system takes to depolarize and repolarize during each heartbeat.