Effect of pre- and postnatal nicotine exposure on norepinephrine-mediated contractions of aorta in male adult offspring in the absence or presence of l-NNA
n = 7 to 8 in each group.
↵ a P < 0.05, +L-NNA vs. -L-NNA.
↵ b P < 0.05, nicotine vs. control.