Calcium dependence of potassium contractures in denervated frog muscle.
D000818:Animals; D001001:Anura; D002110:Caffeine / Q000494:pharmacology; D002118:Calcium / Q000494:pharmacology*; D003714:Denervation; D066298:In Vitro Techniques; D008274:Magnesium / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects*; D009132:Muscles / Q000187:drug effects* / Q000294:innervation; D011188:Potassium / Q000494:pharmacology; D011894:Rana pipiens
D002110:Caffeine; D008274:Magnesium; D011188:Potassium; D002118:Calcium