Obestatin as contractile mediator of excised frog heart
نویسندگان
چکیده
منابع مشابه
Feedback in the Contractile Mechanism of the Frog Heart
Shortening causes a transient decrease, extension an increase, in activity during contractures of the frog ventricle induced by high Ca or by isosmotic K solution. This is shown by the fact that, after the immediate passive shortening, the muscle is extended under isotonic conditions when the load is diminished, and that under isometric conditions quick release causes first a rapid drop, then a...
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Previous studies of the performance characteristics of the heart have usually been directed to its function as a pump and, therefore, have been concerned principally with measurements of intravascular and intracardiac pressures, flows, and derivatives of these variables. Over the past three decades, extensive studies of skeletal muscle have provided an understanding of the mechanical behavior a...
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ILIEVA, B., Y. IVANOVA, P. VASILEVA, H. GAGOV and I. SAZDOVA, 2014. Infl uence of silver nanoparticles with different surface coating on the excised frog heart. Bulg. J. Agric. Sci., Supplement 1: 3–8 The surface coating of silver nanoparticles is crucial to the nanoparticle properties as size and shape, stability, solubility and targeting, which are responsible to their biological effects. In ...
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Contractile activation was studied in frog single muscle fibers treated with tetrodotoxin to block action potentials. The membrane potential in a short segment of the fiber was controlled with a two-electrode voltage clamp, and the contractile response of superficial myofibrils in this segment was observed microscopically. The strength-duration relation for contractile activation was similar to...
متن کاملContractile properties of isolated muscle spindles of the frog.
Force and isotonic shortening velocities were studied (0.6-4.0 degrees C) in isolated single muscle spindles from the anterior tibialis muscle of Rana temporaria using techniques that enabled measurements both from the spindle as a whole and from marked segments of the preparation. The force-velocity relationship during tetanic stimulation exhibited the same biphasic shape as previously describ...
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ژورنال
عنوان ژورنال: Open Life Sciences
سال: 2009
ISSN: 2391-5412
DOI: 10.2478/s11535-009-0023-3