Study on the pancreatic secretion and its regulation in geese
2000
Ai Xiaojie | Han Zhengkang | Chen Jie (Nanjing Agricultural Univ. (China). Key Lab. of Animal Physiology and Biochemistry)
Eight seven-month-old crossbred (Sichuan White X Tai Lake) geese about 3.4kg BW were fitted with chromic main pancreatic duct and duodenal cannulas.The birds were kept in individual pens and feeds and water intake were given ad libitum. The barley based diet (contained 45% barley) was fed in daytime (8:00-20:00), whereas deprived in nighttime. The pancreatic juices were collecting continuously. The results showed that the pancreatic juice of geese was secreting continuously and rhythmatically. The secretion rate averaged (307.59 plus or minus 29.40) muL/h in daytime and (100.00 plus or minus 22.45) muL/h in nighttime. The volume of daytime took up 73.66% and that of nighttime was 26.34% in total volume. After subcutaneous injection of atropine ( 0.5 mg/bird) the secretion rate was decreased significantly (P0.01), and the activities of protease, lipase and amylase in pancreatic juice were also reduced significantly compared with the control phase (P0.01). It suggests that pancreatic secretion is regulated by cholinergic nerves. Giving proglumide orally (150 mg/kg), the secretion rate was not changed significantly (P0.05) compared with the control phase. Whereas the activities of protease, lipase and amylase in pancreatic juice were reduced significantly (P0.01). These results suggest that the proglumide affect the pancreatic secretion by blocking the CCK receptor, whereas the secretion volume is not influenced (P0.05)
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