EFFECT, ON HEAT RIGOR, OF TREATING SARTORIUS MUSCLES OF FROGS WITH RINGER'S SOLUTION CONTAINING SODIUM LACTATE OR CERTAIN OTHER SALTS; ALSO, WITH ACID AND ALKALINE RINGER'S SOLUTIONS

Abstract

Evidence is given for the suggestion that the lowered temp. of heat rigor, after fatigue or after treatment of the muscle with alkaline Ringer''s solution of suitable p h, may be due to a higher than ordinary concentration of inorganic phosphate in the muscle (brought about by the breakdown of hexose phosphate, etc.) under conditions that tend to inhibit "oxidation recovery" of the muscle. It is shown that, of themselves, loss of glycogen and loss of lactacidogen from fatigued muscles can not be responsible for the lowered temp. of heat rigor.