light receptor

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• Light-gated ion channel — Light gated ion channels are a group of transmembrane proteins that form ion channels; pores which open or close in response to light. Most light gated ion channels have been synthesized in the laboratory for study, though one naturally occurring …   Wikipedia

• light adaptation — n the adjustments including narrowing of the pupillary opening and decrease in rhodopsin by which the retina of the eye is made efficient as a visual receptor under conditions of strong illumination compare DARK ADAPTATION light adapt·ed līt ə… …   Medical dictionary

• receptor — ► NOUN Physiology ▪ an organ or cell that responds to external stimuli such as light or heat and transmits signals to a sensory nerve …   English terms dictionary

• Light meter — A light meter is a device used to measure the amount of light. In photography, a light meter is often used to determine the proper exposure for a photograph. Typically a light meter will include a computer, either digital or analogue, which… …   Wikipedia

• Receptor — In cell biology, a structure on the surface of a cell (or inside a cell) that selectively receives and binds a specific substance. There are hoards of receptors. There are receptors for insulin, receptors for low density lipoproteins (LDL), etc.… …   Medical dictionary

• Light effects on circadian rhythm — Numerous organisms maintain inherent individual rhythms to biological processes, known as circadian rhythms, that assist the organism in maintaining functional periodicity relative to the 24 hour day/night cycle of the earth. These rhythms are… …   Wikipedia

• light adaptation — noun the process of adjusting the eyes to relatively high levels of illumination; the pupil constricts and the cones system is operative • Hypernyms: ↑adaptation * * * noun : the adjustments including narrowing of the pupillary opening, decrease… …   Useful english dictionary

• receptor — n. (often attrib.) Biol. 1 an organ able to respond to an external stimulus such as light, heat, or a drug, and transmit a signal to a sensory nerve. 2 a region of a cell, tissue, etc., that responds to a molecule or other substance. Etymology:… …   Useful english dictionary

• receptor — re|cep|tor [rıˈseptə US ər] n a nerve ending which receives information about changes in light, heat etc and causes the body to react in particular ways …   Dictionary of contemporary English

• receptor — n. 1) a cell or group of cells specialized to detect changes in the environment and trigger impulses in the sensory nervous system. All sensory nerve endings act as receptors, whether they simply detect touch, as in the skin, or chemical… …   The new mediacal dictionary

• Melanocortin 1 receptor — (alpha melanocyte stimulating hormone receptor) Identifiers Symbols MC1R; CMM5; MGC14337; MSH R; SHEP2 External IDs …   Wikipedia