The Physiology of the Antennal Gland of Carcinus Maenas (L.) III. Glucose Reabsorption

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Abstract
Glucose is actively reabsorbed by the antennal gland. In 100% sea water there is a blood threshold concentration of approximately 150 mg.%. This does not indicate the maximum rate of glucose reabsorption. Below the threshold, reabsorption is not always complete, but may be if carbohydrate sources are limited or absent. The threshold level depends on the rate at which fluid passes through the antennal gland, an increase in urine production rate being correlated with a reduction in the glucose threshold. Phloridzin inhibits reabsorption and glucose U/B ratios approach unity, indicating that glucose is filtered passively into the antennal gland.