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Fig. 2. Effects of (A) hypoxia (N=12) and (B) acetylcholine (ACh; 1
µmol kg–1) injections (N=7) on blood flow
velocity in efferent filament arteries (EFA). •, ACh; 
, ACh after
atropine injection. Values are means ± S.E.M. and normalized
to the proportion (%) of pre-hypoxic velocity. The line indicates a time
period significantly different from the last pre-exposure value
[P<0.05; non-parametric ANOVA (Freidmann test) with Dunn
post-test]. The asterisk indicates a significant difference between atropine
treatment and control.
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