Fig. 7. Integrated multiunit taste recordings from three separate facial nerve twigs (A–C) innervating the maxillary barbel in a single fish showing the variability of the magnitude of the integrated responses to bile salts with respect to amino acids. (A) Nerve twig lacking a bile-salt response but showing a large-magnitude amino acid response. (B) Nerve twig with a significant bile-salt response and an even-greater-magnitude amino acid response. (C) Nerve twig responding approximately equally to the bile salt and amino acid mixtures. C, CFTW control; BS, a mixture of 10^–5 mol l^–1 TCDC, TCA, GCDC and CDC; AA, a mixture of 10^–6 mol l^–1 L-alanine, L-arginine and L-proline.