( ( ( ( Controls dilatation ) ( of ( capillaries ( and ( stops construction ) ) ) ) ) ( of ( bronical ( smooth muscle ) ) ) ) . )
(ROOT (NP (NP (JJ Controls) (NN dilatation)) (PP (IN of) (NP (NNS capillaries) (CC and) (NNS stops) (NN construction))) (PP (IN of) (NP (JJ bronical) (JJ smooth) (NN muscle))) (. .)))
Controls dilatation of capillaries and stops construction of bronical smooth muscle.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (DT the) (JJ smooth) (NN muscle)) (VP (VBZ relaxes)))) (, ,) (NP (DT the) (NNS arterioles)) (VP (VBD dilate) (, ,) (S (VP (VBG allowing) (NP (NN blood)) (S (VP (TO to) (VP (VB enter) (NP (DT the) (NNS capillaries)))))))) (. .)))