Abstract
Isolated frog sartorius muscle was incubated for 3 h in Ringer solution (5 mM phosphate buffer) at pH 7 or pH 8. Each muscle was stimulated supramaximally at 2 per second continuously. Muscles at pH 7 fatigued more quickly than those at pH 8. Muscles at pH 8 released acid whereas those at pH 7 did not.
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