Fig. 5.

Mean lumen negative transepithelial voltages (V_te; –s.e.m.) of five anterior midguts stimulated with serotonin (0.2 μmol l^–1) in the presence (gray bar) and absence (white bar) of luminal amiloride (200 μmol l^–1), and photographs of a representative preparation of the anterior midgut of larval (fourth instar) Aedes aegypti at identical times after perfusion stop in the presence (right) and absence (left) of luminal amiloride (200 μmol l^–1). [Figure reproduced from Onken and colleagues (Onken et al., 2008).]