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Fig. 1. The effects of the NO donor SNP (5x103 mol
l1; cross-hatched bars; N=6) on (A) noradrenaline
(unfilled component of bars), adrenaline (filled component of bars) and total
catecholamine (sum of noradrenaline + adrenaline) and (B) nitric oxide (NO)
secretion rates over a 10 min period in response to electrical stimulation (60
V,20 Hz) of a perfused posterior cardinal vein preparation of rainbow trout.
Values are means ± 1 S.E.M. A dagger denotes a significant
difference (P<0.5) between pre-stimulated and stimulated samples.
An asterisk denotes a significant difference (P<0.5) between the
control (N=6) and the SNP treated group.