Fig. 5.

Summary of CVC responses to whole body heat stress. Values are means ± SE. Under normothermic conditions during perfusion of all sites with Ringer solution, CVC values, normalized to their respective maxima, did not differ significantly among sites (P > 0.05). Also during normothermia, perfusion of one site with 2% DMSO and another with 1 mM ODQ did not produce any significant differences among sites (P > 0.05). In response to CS, CVC fell at all sites compared with normothermia (*P < 0.05), but responses did not differ among sites (P > 0.05). During heat stress, CVC increased at all sites compared with normothermia (P < 0.05). In heat stress, CVC increased to similar levels at sites that received Ringer only and 2% DMSO (P > 0.05), but was significantly attenuated at sites that received 1 mM ODQ (**P < 0.05, ODQ vs. Ringer or 2% DMSO). NS, nonsignificant.