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Describe the Initiation of Visual Impulse
When light falls on the retina it is absorbed by the photosensitive pigments of rods (rhodopsin) and cones (photopsin). It initiates photochemical changes such as rhodopsin bleaching and regeneration that stimulate electrical changes. Rhodopsin consists of a protein (opsin) and a carotenoid-11-cis retinal. Light that is absorbed by rhodopsin converts 11-cis retinal into trans retinal. This process is an isomerisation that occurs through the formation of many chain reactions and the reduction of c-GMP. The reduction of c-GMP is responsible for closure of sodium channel, leading to hyperpolarisation and electric response in bipolar cells and other neural cells. Thus producing electric response. Then all trans retinal reisomerise into 11-cis retinal and then combine with opsin to form rhodopsin. A similar process occurs for photopsin.
Aeration is the process on which water and air come into contact. It is carried out by spraying water in the form of spray or fountain over air. Aeration achieves the following obj
Explain An Overview of Water Soluble Vitamins? Vitamins, we already know, are classified by the materials in which they will dissolve. Fat-soluble vitamins -vitamin A, D, E a
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Determine Energy requirements of school children and adolescents? Table depicts the energy requirements of school children and adolescents, as recommended by ICMR (1990).
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