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Figure 1 Forearm blood flow responses to albuterol (± L-NMMA) in women and men. Bars indicate mean ± SEM increase in blood flow above the immediately preceding baseline. Open bars show responses to albuterol coinfused with saline; closed bars show responses to albuterol coinfused with L-NMMA (16 µmol/min). Responses to albuterol were greater in women than they were in men (n = 8 for each gender, p = 0.02). NG-monomethyl-L-arginine inhibited responses to albuterol (p < 0.003). Inhibition by L-NMMA was similar (p = 0.83) in women and men. L-NMMA = NG-monomethyl-L-arginine.