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Fig. 6. The effect of propranolol (A,B) and clonidine (C,D) on arterial (Qa) and venous (Qv) blood flow to the abdominal skin in non-acclimated (NAc; A,C) and heat-acclimated (HAc; B,D) pigeons at room temperature. HAc pigeons responded to both treatments by an increase in Qa and a decrease in Qv (P<0.005). No difference in {Delta}Qa—v blood flow was observed in the NAc pigeons (P>0.05). Values are means ± S.E.M. of 7 birds. *P<0.05, **P<0.005. The asterisks in parentheses indicate a significant difference between Qa and Qv values.





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