Fig. 8. Representative recordings showing the change in transepithelial voltage (V_t) following the addition of (A) 10 µmol l^–1 Tenmo-ADFb, (B) 1 nmol l^–1 Achdo-KII and (C) 1 mmol l^–1 8-bromo cyclic GMP. Thick arrows show the time of insertion (downward) and withdrawal (upward) of the microelectrode, and thin arrows show when peptides were added. The horizontal bar in C shows when 8-bromo cyclic GMP was present in the perfusate, and the thin arrow indicates the time of addition of 10 µmol l^–1 Tenmo-ADFb.