The Journal of General Physiology
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The Journal of General Physiology, Vol 50, 337-350, Copyright © 1966 by The Rockefeller University Press

ARTICLE

Stimulation of the Salt Receptor of the Blowfly

I. NaCl



Howard L. Gillary 1

1 From the Department of Biology, The Johns Hopkins University, Baltimore.

Dr. Gillary's present address is United States Naval Medical Research Institute, Bethesda

Application of NaCl solutions to the tip of a labellar sensillum of the blowfly elicited a repetitive neural response from the salt receptor. The response was examined with respect to reproducibility and adaptation. A threshold was observed for tests with dilute solutions. Above this, the response increased linearly with the logarithm of the molarity. The response was not significantly affected by the pH of stimulating solutions, buffered or not, between 3 and 10. Beyond this range, it was reversibly inhibited until, at greater extremes of pH, atypical stimulation independent of the presence of salt was seen. Receptor sensitivity increased with fly age. The results presented here may be due to effects at sites in the sensillum other than the receptor membrane.

Submitted on February 9, 1966


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[Abstract] [PDF]


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