Post-tetanic hyperpolarization and electrogenic Na pump in stretch receptor neurone of crayfish
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چکیده
منابع مشابه
CONTRIBUTION OF THE Na+/H+ ANTIPORTER TO THE REGULATION OF INTRACELLULAR pH IN A CRAYFISH STRETCH RECEPTOR NEURONE
Regulation of intracellular pH (pHi) following acidosis induced by NH4+/NH3 exposures was re-investigated in a crayfish stretch receptor neurone using H+and Na+selective microelectrodes. All experiments were performed in nominally HCO3–/CO2free salines. From studies in Na+-free saline and from electrochemical calculations, we concluded that pHi regulation was dependent on extracellular Na+ conc...
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1. In the stretch receptor neurones of the crayfish Astacus astacus, the intracellular pH (pHi), the intracellular Na+ concentration ([Na+]i) and the membrane potential (Em) were measured simultaneously using ion-selective and conventional microelectrodes. Normal Astacus saline (NAS), and salines containing varying amounts of Ca2+ (Ca2+-NAS) but of constant ionic strength, with Na+, Mg2+ or Ba2...
متن کاملMechanotransduction and the crayfish stretch receptor.
Mechanotransduction or mechanosensitivity is found in almost every cell in all organisms from bacteria to vertebrates. Mechanosensitivity covers a wide spectrum of functions from osmosensing, cell attachment, classical sensory mechanisms like tactile senses in the skin, detection of sound in hair cells of the hearing apparatus, proprioceptive functions like recording of muscle length and tensio...
متن کاملChanges of intracellular sodium and potassium ion concentrations in frog spinal motoneurons induced by repetitive synaptic stimulation.
A post-tetanic membrane hyperpolarization following repetitive neuronal activity is a commonly observed phenomenon in the isolated frog spinal cord as well as in neurons of other nervous tissues. We have now used double-barrelled Na+- and K+-ion-sensitive microelectrodes to measure the intracellular Na+- and K+-concentrations and also the extracellular K+-concentration of lumbar spinal motoneur...
متن کاملInhibitory Miniature Potentials in the Stretch Receptor Neurons of Crayfish
Intracellular microelectrodes inserted into the soma of crayfish stretch receptor neurons record frequent fluctuations of the membrane potential. Time course, amplitude, and interval distribution indicate that they are miniature potentials. At the average resting potential the polarity of the miniature potentials depends on the anion used in the microelectrode: KCl electrodes record depolarizin...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1966
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1966.sp008078