[Mechanism of early receptor potential generation and an electrical model of retinal rods in rats].
A passive electric model of the retinal rod can reproduce the changes of the ELP-waveform at temperatures within the range 10 degrees--45 degrees C. R2-component of the ERP is generated by the process with the time constant ca. 500 microseconds (37 degrees C) and activation energy 31 kcal/mol characteristic of metarhodopsin I--metarhodopsin II transition. R1 originates not later than at prelumirhodopsin--lumirhodopsin conversion. Charge displacements are 0.006 (R1) and 0.04 (R2) electronic charges per rhodopsin bleached. The model is used for determining membrane capacitance and resistance of the rat retinal rod.
D000818:Animals; D004553:Electric Conductivity; D008564:Membrane Potentials; D008959:Models, Neurological; D010786:Photoreceptor Cells / Q000502:physiology*; D051381:Rats; D012168:Retinal Pigments / Q000502:physiology*; D012243:Rhodopsin / Q000502:physiology*; D013696:Temperature; D014785:Vision, Ocular / Q000502:physiology*
D012168:Retinal Pigments; D012243:Rhodopsin
Mekhanizm generatsii rannego retseptornogo potentsiala i élektricheskaia model' palochki setchatki krysy.