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The Effects of Intracellular Iontophoretic Injection of Calcium and Sodium Ions on the Light Response of Limulus Ventral Photoreceptors
- Source :
- The Journal of General Physiology
- Publication Year :
- 1972
- Publisher :
- Rockefeller University Press, 1972.
-
Abstract
- During intracellular iontophoretic injection of Ca(++) into Limulus ventral photoreceptor cells, there is a progressive diminution of the light response. Following Ca(++) injection, the size of the light response slowly recovers. Similarly, there is a progressive diminution of the light response during intracellular injection of Na(+) and recovery after the injection is stopped. The rate of diminution during Na(+) injection is greater for higher [Ca(++)](out). In solutions which contain 0.1 mM Ca(++), there is nearly no progressive decrease in the size of the light response during Na(+) injection. Intracellular injections of Li(+) or K(+) do not progressively decrease the size of the light response. We propose that an increase in [Na(+)](in) leads to an increase in [Ca(++)](in) and that an increase in [Ca(++)](in) by any means leads to a reduction in responsiveness to light.
- Subjects :
- Light
Brachyura
Physiology
Sodium
Potassium
Biological Transport, Active
chemistry.chemical_element
In Vitro Techniques
Sodium Chloride
Calcium
Article
Membrane Potentials
Potassium Chloride
Animals
Photoreceptor Cells
Seawater
Ocular Physiological Phenomena
Chelating Agents
Diminution
Membrane potential
biology
Iontophoresis
Chemistry
biology.organism_classification
Radiation Effects
Biochemistry
Limulus
Biophysics
Intracellular
Subjects
Details
- ISSN :
- 15407748 and 00221295
- Volume :
- 59
- Database :
- OpenAIRE
- Journal :
- Journal of General Physiology
- Accession number :
- edsair.doi.dedup.....cd14eee3c7d1826fab8cc5cf4307bd72