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Stimulus-secretion coupling in an insect salivary gland: cell activation by elevated potassium concentrations
- Source :
- The Journal of experimental biology. 62(3)
- Publication Year :
- 1975
-
Abstract
- Fluid secretion by isolated salivary glands was stimulated by elevating the external potassium concentration. The stimulatory effect of potassium was dependent on external calcium and was potentiated by a subthreshold dose of 5-hydroxytryptamine (5-HT). During the action of 120 mM potassium there was a large calcium dependent decrease in transepithelial resistance similar to that produced with 5-HT at normal potassium concentrations. These results on Calliphora salivary glands are compared with other cases where cells are activated by high potassium. In most cases, the effect of high potassium is dependent upon calcium, suggesting that the latter plays a primary role in cell activation.
- Subjects :
- medicine.medical_specialty
Insecta
Physiology
media_common.quotation_subject
Potassium
Salivary gland cell
chemistry.chemical_element
Insect
Aquatic Science
Calcium
In Vitro Techniques
Calliphora
Salivary Glands
Membrane Potentials
5-Hydroxytryptophan
Internal medicine
medicine
Animals
Secretion
Molecular Biology
Ecology, Evolution, Behavior and Systematics
media_common
External calcium
biology
Sodium
Biological Transport
biology.organism_classification
Electrophysiology
Endocrinology
chemistry
Insect Science
Animal Science and Zoology
Stimulus secretion coupling
Subjects
Details
- ISSN :
- 00220949
- Volume :
- 62
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- The Journal of experimental biology
- Accession number :
- edsair.doi.dedup.....69e271e046486db3a19c753f2a2dc58a