Calcium Action Potentials in the Developing Oocytes of an Insect, Rhodnius Prolixus

Calcium Action Potentials in the Developing Oocytes of an Insect, Rhodnius Prolixus

1. Action potentials (APs) have been recorded for the first time from the oocytes of an arthropod, the haematophagous insect Rhodnius prolixus. In saline containing Zmmoll" calcium, APs could be evoked by depolarizing the oocyte membrane from its resting potential of — 50 mV to a threshold between —35 and — 40 mV. The mean duration and overshoot of the APs were 2-6 s and +16mV, respectively. 2....

Effects of Octopamine on Calcium Action Potentials in Insect Oocytes

Our experiments show that octopamine receptors are present on the developing follicles of an insect, Rhodniusprolixus. Application of D,L-octopamine decreased the duration and overshoot of calcium-dependent action potentials (APs), and increased the intrafollicular concentration of cyclic AMP. The threshold concentration of D,L-octopamine for the reduction in electrical excitability was between...

The Cuticular Pattern in an Insect, Rhodnius Prolixus Stal

Acidocalcisomes as Calcium- and Polyphosphate-Storage Compartments during Embryogenesis of the Insect Rhodnius prolixus Stahl

BACKGROUND The yolk of insect eggs is a cellular domain specialized in the storage of reserve components for embryo development. The reserve macromolecules are stored in different organelles and their interactions with the embryo cells are mostly unknown. Acidocalcisomes are lysosome-related organelles characterized by their acidic nature, high electron density and large content of polyphosphat...

The Role of the Haemocytes in the Growth and Moulting of an Insect, Rhodnius Prolixus (hemiptera)