Intramuscular pH and energy changes in muscle.
Intracellular pH (pHi) and buffering power of unstimulated sartorius muscle (frog) were measured with pH-sensitive microelectrodes. The mean pHi for muscle was about 0.3 units more acid than the extracellular pH in the range 7.0 to 7.2. The buffer power was 44.0 +/- SE 7.1 mM/pH unit for 19 fibres with pHi 6.83 +/- SE 0.05.
D000818:Animals; D004734:Energy Metabolism; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008839:Microelectrodes; D009132:Muscles / Q000378:metabolism*; D011898:Ranidae