Fig. 3. Summary of NaCN-induced respiratory reflexes. Effects of external NaCN
injections into the respiratory water (A,C) or internal NaCN injections into
the afferent branchial artery (B,D) on ventilation frequency and amplitude in
control and MK801-treated fish (MK801) (means + S.E.M.; N=7). Open
bars show the pre-exposure values; grey bars, the maximal response to NaCN. *A
statistically significantly difference (P<0.05) from pre-exposed
values;
statistically significant difference
(P<0.05) between control and MK801-treated fish. For
abbreviations, see Table 3.