Enzyme activities in single electrophysiologically identified crab muscle fibres.
نویسندگان
چکیده
منابع مشابه
Identified Muscle Fibres in a Crab. Differences in Facilitation Properties
1. The superficial muscle fibres in the proximal head of the closer muscle in the crab Eriphia belong to four distinct fibre types (I-IV). By stimulating either the 'slow' or the 'fast' axon, facilitation properties of the EJPs were investigated in eight identifiable muscle fibres which represented the four fibre types. 2. Amount, time course and frequency dependence of facilitation (f) of both...
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1. Contractures were evoked in isolated muscle fibres of the extensor carpopoditi muscle of the crayfish (Astacus fluviatilis) by increasing [K](o) at constant [Cl](o) or at constant [K](o)[Cl](o) product.2. The relation between tension and log [K](o) is S-shaped with a less steep slope if [K](o) was increased at constant [Cl](o). This is due to a smaller drop in membrane potential for a given ...
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Inactivation of Ca channels was examined in crab muscle fibres using the voltage-clamp method. A satisfactory suppression of outward currents was attempted by the use of K+ blocking agents: TEA, 4AP and Cs ions instead of K+ ions applied extracellularly. The inactivation of Ca current appeared as a bi-exponential process. The faster component had a mean value of the time constant of 50 ms while...
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The outward-going rectification was examined in crab muscle fibres under current clamp and voltage clamp conditions. Experiments were performed on large diameter crab muscle fibres; these generate all-or-none responses. Under current clamp conditions, the outward-going rectification can be elicited in the muscle membrane in a choline chloride solution; it however disappears in CT free artificia...
متن کاملEnzyme patterns in single human muscle fibers.
Individual muscle fibers from the biceps of five individuals were analyzed for 10 different enzymes. For each person, lactic dehydrogenase and adenylokinase were first measured in 50 to 100 fibers. From each large group, 20 or more fibers, representing the full range of enzyme activity, were analyzed in duplicate for the other eight enzymes (glycogen phosphorylase, P-fructokinase, pyruvate kina...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1986
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1986.sp015968