Effect of muscle length on energy balance in frog skeletal muscle.
نویسندگان
چکیده
منابع مشابه
Frog Skeletal Muscle
Autoradiographs consisting of a 1000 A thick tissue section and a 1400 A thick emulsion film have been prepared from frog toe muscles labeled with Ca 45. The muscles had been fixed with an oxalate-containing osmium solution at rest at room temperature, at rest at 40°C, during relaxation following K+ depolarization or after prolonged depolarization. From 6 to 39 per cent of K+ contracture tensio...
متن کاملSparks in Frog Skeletal Muscle
Calcium sparks are brief, highly localized elevations of [Ca 2 ], which arise spontaneously or can be evoked by depolarization in many types of muscle cells. The Ca 2 is released into the cytoplasm from intracellular stores (the SR) through the SR Ca 2 release channels (the RYR). Since their discovery (in cardiac muscle; Cheng et al., 1993), Ca 2 sparks have attracted substantial attention. The...
متن کاملReappraisal of diffusion, solubility, and consumption of oxygen in frog skeletal muscle, with applications to muscle energy balance
Previously we tested the validity of the one-dimensional diffusion equation for O2 in the excised frog sartorius muscle and used it to measure the diffusion coefficient (D) for O2 in this muscle and the time course of its rate of O2 consumption (Qo2) after a tetanus (Mahler, 1978, 1979, J. Gen. Physiol., 71:533-557, 559-580, 73:159-174). A transverse section of the frog sartorius is in fact wel...
متن کاملSparks of Frog Skeletal Muscle
An algorithm for the calculation of Ca 2 1 release flux underlying Ca 2 1 sparks (Blatter, L.A., J. Hüser, and E. Ríos. 1997. Proc. Natl. Acad. Sci. USA. 94:4176–4181) was modified and applied to sparks obtained by confocal microscopy in single frog skeletal muscle fibers, which were voltage clamped in a two-Vaseline gap chamber or permeabilized and immersed in fluo-3–containing internal soluti...
متن کاملImpedance of Frog Skeletal Muscle
The linear circuit parameters of 140 muscle fibers in nine solutions are determined from phase measurements fitted with three circuit models: the disk model, in which the resistance to radial current flow is in the lumen of the tubules; the lumped model, in which the resistance is at the mouth of the tubules; and the hybrid model, in which it is in both places. The lumped model fails to fit the...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1981
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1981.sp013800