The energetic cost of photoreception in retinal rods of mammals.
Arch Ital Biol
; 135(2): 95-109, 1997 Mar.
Article
en En
| MEDLINE
| ID: mdl-9101022
ABSTRACT
The effects of temperature on rod sensitivity and adaptation are analysed in the general context of the energy requirements of photoreception. The dependence of adaptation on the [Na]i turn-over appears to be critical in mammalian rods where the metabolic load is particularly heavy because of both temperature conditions and large Na+ influx. Estimates of the energy dissipated by rods in darkness and during bright illumination show that the metabolic load is reasonably well distributed. From this analysis it also results that most of the energy, which a rod dissipates in both darkness and light, is needed to keep [Na]i and [Ca]i low.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Visión Ocular
/
Adaptación Fisiológica
/
Células Fotorreceptoras Retinianas Bastones
/
Metabolismo Energético
Tipo de estudio:
Health_economic_evaluation
Límite:
Animals
Idioma:
En
Revista:
Arch Ital Biol
Año:
1997
Tipo del documento:
Article
País de afiliación:
Italia
Pais de publicación:
IT
/
ITALIA
/
ITALY
/
ITÁLIA