An equivalent circuit for small atrial trabeculae of frog
نویسندگان
چکیده
منابع مشابه
Voltage Clamp Analysis of Repetitive Firing in Frog Atrial Trabeculae
The membrane currents responsible for induced pace-maker activity in frog atrial muscle were investigated using a double sucrose gap technique. The trabecula was clamped to the potential from which pace-making started (35—40 mV positive to resting potential) and immediately after that a test pulse was applied and the membrane inward current was measured. When the duration of the conditioning pu...
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The equivalent circuit that has been used in the analysis of nerve voltage-clamp data is that of the membrane capacity in parallel with the membrane resistance. Voltage-clamp experiments on frog atrial tissue indicate that this circuit will not suffice for this cardiac tissue. The change in membrane current associated with a step change in membrane potential does not show a rapid spike of capac...
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The effects of a chloride-poor medium (methanesulfonate substituted) and a chloride transport inhibitor (SITS) on the outward delayed current and the tonic tension were studied on frog atrial trabeculae under voltage-clamp conditions. The outward delayed current decreased in low-chloride medium (10.5 mmol/l) or in the presence of SITS (2 mmol/l). The tonic tension increased in chloride-poor sol...
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An equivalent circuit model for predicting the frequency response of a square ring slot frequency selective surface (SRS-FSS) for normal incidence is described. The proposed FSS consists of an array of square patches centered within a wire grid. The presented circuit model is formed by the impedance of the wire grid that is parallel with the impedance of the patch array, also the mutual couplin...
متن کاملRole of the slow inward current during the repolarisation process in frog atrial trabeculae.
Voltage clamp experiments were performed to analyse the influence of the slow inward current (isi) on the repolarisation process in frog atrium. MnCl2 was used as isi blocker. The action potential was prolonged by depolarising pulses applied during the plateau. This was an expected result considering that, at positive potentials the time constant for isi inactivation increases. This effect was ...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1975
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(75)85883-8