Abstract
Summary
1. The activities of succinic dehydrogenase, nonspecific esterase, cholinesterase, glucose-6-phosphatase, alkaline phosphatase, cytochrome oxidase, DPN diaphorase, TPN diaphorase, phosphorylase and leucine aminopeptidase in the frozen sections of adrenal, liver, kidney, lung, spleen, pancreas, heart, striated muscle, small arteries and aorta of acutely exercised and sedentary rabbits were studied histochemically. 2. There were no enzymatic changes attributable to the acute exercise in any organs. 3. TPN diaphorase is present in the intima, medial muscle fibers and adventitia of the aorta. 4. Phophorylase is present in the medial muscle fibers of the aorta. 5. Leucine aminopeptidase is absent in all parts of the aorta. 6. In the spontaneous lesions, TPN diaphorase and phosphorylase are decreased as the medial muscle fibers are degenerated.
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