Bronchial smooth muscle tone in normal subjects.
D000293:Adolescent; D000328:Adult; D001980:Bronchi / Q000294:innervation*; D004983:Ethanolamines / Q000494:pharmacology*; D005260:Female; D005280:Fenoterol / Q000494:pharmacology*; D006801:Humans; D009241:Ipratropium / Q000494:pharmacology; D008297:Male; D009130:Muscle, Smooth / Q000187:drug effects*
D004983:Ethanolamines; D005280:Fenoterol; D009241:Ipratropium