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  • Title: The sites in the duodenum of receptor areas which affect abomasal emptying in the calf.
    Author: Bell FR, Holbrooke SE.
    Journal: Res Vet Sci; 1979 Jul; 27(1):1-4. PubMed ID: 504796.
    Abstract:
    Calves were prepared with abomasal and duodenal cannulae to assess the effects on abomasal emptying of duodenal infusates at different rates and different sites. In two calves infusions of isotonic NaHCO3 or 60 mM HCl 30 cm distal to the pylorus were as effective in controlling abomasal emptying as infusions of the duodenum from 5 cm distal to the pylorus, and in three other calves they were as effective as perfusing the whole duodenum including the most proximal 5 cm. Reducing the rate of duodenal infusion of 60 mM HCl from 10 to 2.5 ml/min diminished its effect from total inhibition of gastric emptying to slight or negligible inhibition. The stimulation of gastric emptying by duodenal infusion of isotonic NaHCO3 solution was undiminished by reduced rates of infusion. It is proposed that in the calf receptors which activate and inhibit gastric emptying are present throughout the duodenum.
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