Ionic permeability of the blood-brain barrier system of an insect Carausius morosus.
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چکیده
منابع مشابه
Calcium Action Potentials in the Skeletal Muscle Fibres of the Stick Insect Carausius Morosus
The ionic requirements for the generation of action potentials in the ventral longitudinal muscle fibres of the stick insect, Carausius morosus, were investigated. Ca-free Ringer rapidly and reversibly abolished the action potential. In the presence of tetraethylammonium (TEA) ions (to suppress outward currents) the overshoot of the action potential changed 26 mV for a 10-fold change in [Ca]0. ...
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The extremely specialized ionic composition of the haemolymph in some phytophagous insect species presents certain difficulties in the interpretation of axonal conduction in terms of the classical membrane theory which has been found to be applicable in most animal groups. In particular the very low sodium level, together with the relatively high concentration of magnesium ions, represent condi...
متن کاملIdentification of multiple peptides homologous to cockroach and cricket allatostatins in the stick insect Carausius morosus.
Eighteen peptides were isolated from brain extracts of the stick insect Carausius morosus. The peptides were purified in four steps by high-performance liquid chromatography, monitored by their ability to inhibit juvenile hormone biosynthesis by corpora allata of the cricket Gryllus bimaculatus in vitro, and chemically characterised by Edman degradation and mass spectrometry. We obtained comple...
متن کاملThe location of penetration barriers in the ganglia of the American cockroach, Periplaneta americana (L.).
In the period between 1950 and i960 there were a number of reports of the relative insensitivity of insect nerves and ganglia to various electrolytes, drugs and toxicants which affected vertebrate nervous systems. Examples include: potassium acting on the crural nerve of the locust, Locusta migratoria (Hoyle, 1952, 1953); potassium and acetylcholine acting on ganglia of the American cockroach P...
متن کاملHormonal control of the malpighian tubules of the stick insect, Carausius morosus.
Factors have been isolated from the central nervous system of the stick insect, Carausius morosus, which affect the rate of secretion of the Malpighian tubules (Gersch et al. i960; Unger, 1965; Vietinghoff, 1967), but it has not yet been shown that these factors are of physiological importance in vivo. There is, however, an accumulation of stainable material in the corpora cardiaca of Carausius...
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عنوان ژورنال:
- The Journal of experimental biology
دوره 82 شماره
صفحات -
تاریخ انتشار 1979