( ( ( ( ( ( Active ( Transport ( Active transport ) ) ) ( requires ( ( ( the expenditure ) ( of energy ) ) ( to ( ( ( transport ( the molecule ) ) ( from ( ( one side ) ( of ( the membrane ) ) ) ) ) ( to ( the other ) ) ) ) ) ) ) , ) but ) ( ( active transport ) ( is ( ( ( the ( only type ) ) ( of transport ) ) ( that ( ( can actually ) ( ( take molecules ) ( ( ( up ( their ( concentration gradient ) ) ) ( as ( well as ) ) ) down ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP Active) (NNP Transport) (NNP Active) (NN transport)) (VP (VBZ requires) (S (NP (NP (DT the) (NN expenditure)) (PP (IN of) (NP (NN energy)))) (VP (TO to) (VP (VB transport) (NP (DT the) (NN molecule)) (PP (IN from) (NP (NP (CD one) (NN side)) (PP (IN of) (NP (DT the) (NN membrane))))) (PP (TO to) (NP (DT the) (JJ other)))))))) (, ,) (CC but) (S (NP (JJ active) (NN transport)) (VP (VBZ is) (NP (NP (DT the) (JJ only) (NN type)) (PP (IN of) (NP (NN transport))) (SBAR (WHNP (WDT that)) (S (VP (MD can) (ADVP (RB actually)) (VP (VB take) (NP (NNS molecules)) (PP (PP (IN up) (NP (PRP$ their) (NN concentration) (NN gradient))) (CONJP (RB as) (RB well) (IN as)) (PP (IN down)))))))))) (. .)))
Active Transport Active transport requires the expenditure of energy to transport the molecule from one side of the membrane to the other, but active transport is the only type of transport that can actually take molecules up their concentration gradient as well as down.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT the) (NN movement)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN across) (NP (DT a) (ADJP (JJ membrane) (PP (IN without) (NP (NP (DT the) (NN input)) (PP (IN of) (NP (NN energy)))))) (JJ passive) (NN transport))))))) (. .)))