Fig. 8. The effect of PACAP 27 (10-7 mol l-1, N=7),
VIP (10-7 mol l-1, N=6; 10-6 mol
l-1, N=5) and GABA (10-5 mol l-1,
N=5; 10-4 mol l-1, N=6) on the
longitudinal smooth muscles of the proximal intestine of Xenopus
laevis. Neither PACAP 27 nor VIP nor GABA had any effect on the force
developed by the intestine. The results are presented as mean force developed
(± S.E.M.) above resting level. Open bars represent values immediately
before addition of drug. *P
0.05 compared to the
control (C).