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Figure 1


Fig. 1. Electrochemical gradients and ion activities in (A) unstimulated and (B) 5-HT-stimulated Malpighian tubules of Rhodnius prolixus. Values for pHbath, pHi, pHlumen and luminal aK, aCl and aNa are presented as means ± s.e.m. for (N) tubules. Values in B were recorded 30 min after stimulation with 10–6 mol l–1 5-HT. Intracellular and bath activities for Na+, K+ and Cl– (italicised) and electrochemical gradients for Na+, K+ and Cl– across the basolateral membrane are taken from Ianowski et al. (Ianowski et al., 2002).





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