The effects of force-feeding on enzymes of the liver, kidney, pancreas and digestive tract of chicks

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Abstract
1. Force-feeding of young chicks for 15 d increased kidney arginase (EC3·5·3·1) activity threefold. Fasting for 30 h decreased this activity by 50%.2. Liver xanthine dehydrogenase was slightly increased after force-feeding and decreased following fasting.3. The specific activities of two pentose-phosphate-cycle enzymes were not significantly affected by force-feeding, but glucose-6-phosphate dehydrogenase (EC1.1.1.49) decreased following fasting.4. The over-all secretion of digestive enzymes increased parallel to the increase in food consumption. Therefore, despite an increased absolute weight of the pancreas and intestinal chyme, specific activities were the same in the force-fed andad lib.-fed groups, except for a higher activity in intestinal amylase.5. Fasting did not affect the pancreatic enzymic activities.
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