Electrophysiological responses of the housefly, Musca domestica nebula (Fr), taste receptors to KCl.

ABSTRACT

This paper aims at studying the response of the housefly labellar chemoreceptor to stimulation by KCl. These studies are limited to testing various concentrations of KCl solutions (0.005-1 M), using the electrophysiological "tip recording" method and examining the various spike characteristics such as threshold, phasic and tonic response, spike amplitudes, frequency and adaptation; for the anion, cation and water receptors. The large, medium and small hairs all respond to salt. The frontal large, medium and small hairs show a higher frequency response to equimolar KCl than the distal hairs. There is a bilateral symmetry in response pattern. The results are compared with the reported work on Phormia and Calliphora species. The Biedler's hypothesis is also tested for the salt receptors of Musca.