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Figure 8


Fig. 8. (A) Representative traces from simultaneous recordings of central arterial flow (CAF, upper trace) and blood cell flux (BCF, lower trace) in a B. marinus dehydrated by 14.4%. (B) Time course for changes in CAF (filled circles) and seat patch BCF (filled squares). Each point represents mean ± 1 s.e.m. of nine trials in five toads. Recordings were started immediately after the toads had been transferred from the dehydration chamber to the wet chamber. CAF and heart rate (stars) declined during the first 3 min of recording, followed by an increase to a stable level, which was reached in 10 min. Initial CAF was much lower in two toads (four recordings, open circle), which remained unhandled in the dehydration chamber prior to water contact. (C) Time course for CAF and fH when dehydrated toads were presented with water but not handled. Because of the small sample size, data points are normalized as the ratio between the control values and those recorded sequentially after water exposure was initiated.





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