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Tetracaine inhibits outward currents at positive membrane potentials in SEA SMCs from Young and Old. A and B: data are mean current densities ± SE (in pA/pF) in the absence (Control) and presence of tetracaine (100 μM) in SMCs from Young (A; n = 6 cells from 3 mice) and Old (B; n = 7 cells from 3 mice). *P < 0.05 vs. Control. C: tetracaine-sensitive currents were not different between SMCs from Young vs. Old (P > 0.05).
