Medical Definition of Dark current

1. Current caused by constant influx of sodium ions into the rod outer segment of retinal photoreceptors and that is blocked by light (leading to hyperpolarization). The plasma membrane sodium channel is controlled through a cascade of amplification reactions initiated by photon capture by rhodopsin in the disc membrane. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Lexicographical Neighbors of Dark Current

darknesses
darkroom
darkrooms
darks
Darkschewitsch
darksome
darky
dark adaptation
dark adaptation
Dark Ages
dark blue
dark bread
dark cell
dark chocolate
dark comdey
dark current (current term)
dark field illumination
dark field illumination
dark field imaging
dark field microscopy
dark field objective
dark field slides
dark field stop
dark glasses
dark ground illumination
dark horse
dark lantern
dark matter
dark meat
dark reaction

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