Studies on “non-irritable” muscle

Abstract
Upon electrical stimulation of "non-irritable" frog muscle, no lactic acid is formed and no carbohydrate disappears. There is no heat production upon stimulation of non-irritable muscle. The resting anaerobic heat-rate of non-irritable muscle is normal. The oxi-dative mechanisms are intact. The caloric quotient of non-irritable muscle is much higher than that of normal muscle, being of the order of 740 instead of 375.