See Also: dark current(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Medicine Lodge Memorial Hospital- Medicine Lodge(health)
Orthomolecular medicine (orthomolecular nutritional medicine, orthomolecular therapy)(health)
dark(1)(dictionary)
dark(2)(dictionary)
dark(dictionary)
dark matter(encyclopedia)
dark horse(dictionary)
dark glasses(dictionary)

dark current (medicine)


dark current
<physiology> 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.