| Autor: |
K A, Bykov, A V, Dmitriev, S N, Skachkov |
| Rok vydání: |
1984 |
| Předmět: |
|
| Zdroj: |
Fiziologicheskii zhurnal SSSR imeni I. M. Sechenova. 70(10) |
| ISSN: |
0015-329X |
| Popis: |
Similar downhill gradients of [K]0 were revealed in the aspartate--treated dark--adapted frog retina and in the eye cup without aspartate. [K]0 in the receptor layer is 8 X 10(-3) M, while in the proximal retina it is nearly 2.7 X 10(-3) M. Illumination decreased [K]0 in the receptor layer to 2.5 X 10(-3) M. The dark level and the light-induced changes of [K]0 were practically unaltered when Ba2+ ions suppressed the slow PIII and the resting transretinal glia potential blocking up the Müller cells permeability for K+. The findings suggest that [K]0 around the receptor space is regulated by red rods with no interference from the Müller cells or pigment epithelial cells. The amplitude of [K]0 changes seems to be physiologically significant. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
