A positive shift in a cell's resting potential (that is normally negative), thus making it numerically smaller and less polarized, eg. -90mV to -50mV. The opposite of hyperpolarization.
In biology, depolarization is a positive-going change in a cell`s membrane potential, making it more positive, or less negative, and thereby removing the polarity that arises from the accumulation of negative charges on the inner membrane and positive charges on the outer membrane of the cell. In neurons and some other cells, a large enough depol....Found on http://en.wikipedia.org/wiki/Depolarization
• (n.) The act of depriving of polarity, or the result of such action; reduction to an unpolarized condition.Found on http://thinkexist.com/dictionary/meaning/depolarization/
(de-po″lәr-ĭ-za´shәn) the reduction of a membrane's resting potential so that it becomes less negative. In cardiac physiology there are several forms: the normal slow diastolic depolarization of pacemaker cells; the slow but normal depolarization of cells of the atrioventricular and sinoatrial nod...Found on http://www.encyclo.co.uk/local/21001
(de-po;lar-u1-za;shun) The loss of membrane polarity in which the inside of the cell membrane becomes less negative in comparison to the outside of the membrane. The term is also used to indicate the reversal of membrane polarity that occurs during the production of action potentials in nerve and muscle cells.Found on http://www.mhhe.com/biosci/abio/glossary.mhtml
(from the article `human cardiovascular system`) ...excess of positive ions on the outside of the sarcolemma (a stage known as the resting potential). When a nerve impulse stimulates ion channels to ... ...a result, the outside of the cell becomes negative and the inside positive. This condition lasts for a short time, after which the c...Found on http://www.britannica.com/eb/a-z/d/32
a loss of polarity or polarizationFound on https://www.encyclo.co.uk/local/20974
[ Confer French dépolarisation
.] The act of depriving of polarity, or the result of such action; reduction to an unpolarized condition. Depolarization of light (Opt.)
, a change in the plane of polarization of rays, especially by a crystalline medi...
Found on http://www.encyclo.co.uk/webster/D/40
A change from a negative to a positive charge, generating an electrical wave (as in the production of the heartbeat).
Found on http://www.thehorse.com/Glossary.xhtml?L=D
A decrease in the potential difference across the cell membrane of a neuron. Most neurons depolarize in response to stimulation.
Found on http://tigger.uic.edu/~hilbert/Glossary.html
a phenomenon by virtue of which all or part of the power of a radio wave transmitted with a defined polarization, no longer has any defined polarization after propagation NOTE - The term 'depolarization' is sometimes used to designate the change from a defined polarization to another defined polarization.
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=705-08-51
reduction of the electric potential difference across a membrane
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=891-02-19
the process or act of neutralizing polarity. In neurophysiology, the reversal of the resting potential in excitable cell membranes when stimulated, i.e., the tendency of the cell membrane potential to become positive with respect to the potential outside the cell.
Found on http://users.ugent.be/~rvdstich/eugloss/DIC/dictio24.html
Type: Term Pronunciation: dē-pō′lăr-i-zā′shŭn Definitions: 1. A relative reduction in magnitude of polarization; in nerve cells, depolarization may result from an increase in the permeability of the cell membrane to sodium ions. 2. The destruction, neutralization, or change in direction of polarity.
Found on http://www.medilexicon.com/medicaldictionary.php?t=23810
[n] - a loss of polarity or polarization
Found on http://www.webdictionary.co.uk/definition.php?query=depolarization
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