Fig. 2.
Effects of femoral arterial injection of 1 μg of the δ-opioid receptor agonist [D-Pen2,5]enkephalin, [D-Pen2, D-Pen5]enkephalin (DPDPE) on the pressor and cardioaccelerator responses to static contraction in five freely perfused and five ligated rats. Experiments were performed in subsets of freely perfused and ligated rats that received femoral arterial injection of 100 μg of the κ-opioid receptor agonist U62066. Baseline values are indicated within mean bars for their corresponding conditions. Data are expressed as means ± SE. *P < 0.05 vs. 100 μg U62066.