ACTION POTENTIALS OF OYSTER MYOCARDIUM
نویسندگان
چکیده
منابع مشابه
Characteristics of action potentials of hypertrophied myocardium from rats with renal hypertension.
We investigated the electrophysiological effects of cardiac hypertrophy induced by renal hypertension in rats by comparing transmembrane action potentials (AP) recorded from the papillary muscles of hypertensive (HBP) and normal (SHAM) rats. No significant difference was found between HBP and SHAM AP with regard to resting membrane potential (RMP), action potential amplitude (AMP), overshoot (O...
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Electrical potentials exist across the membranes of virtually all cells of the body. In addition, some cells, such as nerve and muscle cells, are capable of generating rapidly changing electrochemical impulses at their membranes, and these impulses are used to transmit signals along the nerve or muscle membranes. In other types of cells, such as glandular cells, macrophages, and ciliated cells,...
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lntracellular Caz+, K+, CI-, and NOsactivities were measured with ion-selective microeledrodes in the liverwort Conocephalum conicum 1. at rest, during dark/light changes, and in the couese of adion potentials triggered by light or electrical stimuli. l h e average free cytosolic Caz+ concentration was 231 f 65 nM. We did not observe any light-dependent changes of the free cytosolic Caz+ concen...
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• The antagonistic actions of the neurohumoral transmitters, norepinephrine and acetylcholine, on nodal, conducting and atrial tissue have been well established." Evidence for their direct antagonistic effects on ventricular contractility, however, has been more difficult to obtain.*Using direct intracoronary infusions of sympathomimetic and parasympathomimetic drugs, we have obtained unequivoc...
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Exploration of the cytoplasm of the giant esophageal cell of Ascaris with a recording microelectrode shows the existence of shallow spaces where the microelectrode tip becomes extracellular in spite of being in the interior of the cell. When the microelectrode penetrates into these spaces from the cytoplasm, the resting potential shifts to a different level or entirely disappears. At the same t...
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ژورنال
عنوان ژورنال: The Japanese Journal of Physiology
سال: 1961
ISSN: 1881-1396,0021-521X
DOI: 10.2170/jjphysiol.11.162