Dark adaptation processes in the amphibian rod
| Autor: | K. O. Donner |
|---|---|
| Rok vydání: | 1977 |
| Předmět: |
Amphibian
Rhodopsin Opsin genetic structures Biophysics Dark Adaptation Adaptation (eye) Biology Amphibians 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine biology.animal medicine Animals Photoreceptor Cells 030304 developmental biology 0303 health sciences Retina Extinction Ecology Cell Membrane Electric Conductivity Retinal General Medicine eye diseases medicine.anatomical_structure chemistry Linear relation biology.protein sense organs 030217 neurology & neurosurgery |
| Zdroj: | Biophysics of Structure and Mechanism. 3:171-173 |
| ISSN: | 1432-1017 0340-1057 |
| DOI: | 10.1007/bf00535814 |
| Popis: | Rod dark adaptation in the amphibian retina appears to be due to three processes: 1. background adaptation, occurring immediately after the extinction of an adapting or bleaching light, 2. intermediate adaptation, that frequently lasts 30 min or more and 3. opsin adaptation, which in the isolated retina where regeneration of rhodopsin is insignificant, is observed a a permanent loss of sensitivity after the completion of intermediate adaptation. Intermediate adaptation is characterized by a linear relation between log threshold and the amount of "retinal" present, a similar relation is obtained between log threshold and the amount of rhodopsin bleached in opsin adaptation. These adaptation processes are discussed in terms of a model of the rod outer segment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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