Calcium Influx in Skeletal Muscle at Rest, during Activity, and during Potassium Contracture


Calcium influx in the sartorius muscle of the frog (Rana pipiens) has been estimated from the rate of entry of Ca(45). In the unstimulated preparation it is about equal to what has been reported for squid giant axons, but that per impulse is at least 30 times greater than in nerve fibers. The enhanced twitch when NO(-) (2) replaces Cl(-) in Ringer's is… (More)


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