Fig. 2. Time course of dehydration and rehydration rates in control toads (Bufo woodhousei) and those treated with isoproterenol or phentolamine. Means ± 1 S.D. are plotted. Note the time-scale difference between the two plots, which reveals a much higher rate of rehydration than dehydration (see also Table 1). N=11 toads for each of the three treatments.