( They ( ( ( ( ( pick up ) lactate ) and ) ( ( transport it ) ( across ( ( the cell ) ( ( membrane ( from ( ( an area ) ( of ( high ( lactate concentration ) ) ) ) ) ) ( to ( low ( lactate concentration ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VP (VB pick) (PRT (RP up)) (NP (NN lactate))) (CC and) (VP (VB transport) (NP (PRP it)) (PP (IN across) (NP (NP (DT the) (NN cell)) (VP (VBN membrane) (PP (IN from) (NP (NP (DT an) (NN area)) (PP (IN of) (NP (JJ high) (NN lactate) (NN concentration))))) (PP (TO to) (NP (JJ low) (NN lactate) (NN concentration)))))))) (. .)))
They pick up lactate and transport it across the cell membrane from an area of high lactate concentration to low lactate concentration.
(ROOT (S (NP (NNP Passive) (NN transport)) (VP (VP (VBZ requires) (NP (DT no) (NN energy))) (CC and) (VP (VBZ occurs) (SBAR (WHADVP (WRB when)) (S (NP (NNS substances)) (VP (VBP move) (PP (IN from) (NP (NP (NNS areas)) (PP (IN of) (NP (NP (JJR higher)) (PP (TO to) (NP (JJR lower) (NN concentration)))))))))))) (. .)))