The changes in the levets of total anthrone positive substances glycogen and glucose and the activities of phosphorylase, lactate dehydrogenase and succinate dehydrogenase were studied in the in situ heart of the scorpion H. fulvipes, based on the theme of acceleration and inhibition. TAPS and glucose showed appreciable depletion in the accelerated hearts and conservation in the inhibited hearts. Glycogen depletion in the accelerated hearts is not significant while conservation in the inhibited hearts is significant. Both active and total phosphorylases as welt as the combined ratio showed increasing trend with increase in heart rate and vice versa. The role of carbohydrates as metabolic fuel to sustain the heart beat is also discussed.
Elevation in the levels of the blood inorganic ions and depl.etiott in tile levels of the blood organic reserves, except TNPS, noticed during' starvation regime • or tile slu& are discussed in view of their specific roles in energy metabolism.
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