Light-induced changes in extracellular volume in the retina of the drone, Apis mellifera

Orkand, R.K., Dietzel, I. and Coles, J.A. (1984) Light-induced changes in extracellular volume in the retina of the drone, Apis mellifera. Neuroscience Letters, 45(3), pp. 273-278. (doi: 10.1016/0304-3940(84)90238-6)

Abstract

Slices of drone retina were superfused with a Ringer solution containing 1 mM tetraethylammonium (TEA), and the concentration of this ion in the extracellular space ([TEA]0) was measured with ion-sensitive microelectrodes. A train of light flashes for 90 s caused [TEA] to increase by 48 ± 4% (S.E.), n = 12. Since water crosses cell membranes more readily than TEA does this indicates a volume decrease of at least 32%. Measurements of Ca2+ activity under similar conditions showed an increase of 32 ± 4% (S.E.), n = 14. Since this is less than the increase in [TEA]0 it suggests that the total amount of Ca2+ in the extracellular space actually decreased.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Coles, Dr Jonathan
• Authors: Orkand, R.K., Dietzel, I., and Coles, J.A.
• College/School: College of Medical Veterinary and Life Sciences > School of Infection & Immunity
• Journal Name: Neuroscience Letters
• Publisher: Elsevier
• ISSN: 0304-3940
• ISSN (Online): 1872-7972