( ( In ( vascular ( smooth muscle ) ) ) ( , ( ( K ( ATP channels ) ) ( ( ( ( ( are ( ( important modulators ) ( of ( vascular tone ) ) ) ) and ) ( , ( therefore , ) ) ) ( ( play ( a role ) ) ( in ( regulating ( blood flow ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (JJ vascular) (JJ smooth) (NN muscle))) (, ,) (NP (NNP K) (NNP ATP) (NNS channels)) (VP (VP (VBP are) (NP (NP (JJ important) (NNS modulators)) (PP (IN of) (NP (NN vascular) (NN tone))))) (CC and) (PRN (, ,) (ADVP (RB therefore)) (, ,)) (VP (VBP play) (NP (DT a) (NN role)) (PP (IN in) (S (VP (VBG regulating) (NP (NN blood) (NN flow))))))) (. .)))
In vascular smooth muscle, K ATP channels are important modulators of vascular tone and, therefore, play a role in regulating blood flow.
(ROOT (S (NP (JJ Smooth) (NN muscle)) (VP (VBZ regulates) (NP (NP (NN air) (NN flow)) (PP (IN in) (NP (NNS lungs))))) (. .)))
Smooth muscle regulates air flow in lungs.