Movements of Ca in frog heart ventricles at rest and during contractures
نویسندگان
چکیده
منابع مشابه
The Influence of Ionic Strength on Potassium Contractures and Calcium Movements in Frog Muscle
Frog toe muscles were bathed in isotonic, sodium-free Tris chloride, methanesulfonate, or sulfate solutions containing sucrose or mannitol and varying in ionic strength from 0.006 to 0.291. By decreasing the ionic strength the curve relating the peak tension of the K contractures to the log [K] was reversibly shifted to lower [K]. Increasing the [Ca] from 1 to 4 mM almost abolished this effect....
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Biphasic Potassium Contractures in Frog Muscle Fibers
Potassium-induced contractures were studied in single fibers from the semitendinosus muscle of Rana pipiens. Contractures elicited by solutions containing 60-117 mM potassium and 120 mM chloride were biphasic, consisting of a rapid initial contraction with a duration at 23 degrees C of less than 1 sec followed by a slow response with a duration of many seconds. At 13 degrees C, the initial resp...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1963
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1963.sp007166