Fig. 1. Representative examples of heart rate (circles) and Tb (solid line) in Pogona barbata during heating and cooling. The first vertical line in each panel indicates when the infrared heat lamp was switched on, and the second vertical line indicates when the lamp was switched off. Lizards in the control treatment (A) were injected with saline, the muscarinic receptors were blocked during the atropine treatment (B) and cholinergic muscarinic and ß-adrenergic receptors were blocked by injection of atropine+sotalol (C). All pharmaceuticals were administered 2 h before experimentation.
