( ( Epithelial transport ) ( ( entails ( ( ( ( moving ions ) ( across ( one ( cell membrane ) ) ) ) , ) ( ( ( ( ( through ( the cell ) ) , ) and ) finally ) ( across ( another ( cell membrane ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Epithelial) (NN transport)) (VP (VBZ entails) (S (VP (VBG moving) (NP (NNS ions)) (PP (IN across) (NP (CD one) (NN cell) (NNS membrane))) (, ,) (PP (PP (IN through) (NP (DT the) (NN cell))) (, ,) (CC and) (ADVP (RB finally)) (PP (IN across) (NP (DT another) (NN cell) (NN membrane))))))) (. .)))
Epithelial transport entails moving ions across one cell membrane, through the cell, and finally across another cell membrane.
(ROOT (S (NP (DT The) (NN term) (JJ passive) (NN transport)) (VP (VBZ describes) (NP (DT a) (NN way)) (SBAR (IN that) (S (NP (JJ small) (NNS molecules) (CC or) (NNS ions)) (VP (VBP move) (PP (IN across) (NP (NP (DT the) (NN cell)) (VP (VBN membrane) (PP (IN without) (NP (NP (NN input)) (PP (IN of) (NP (NN energy))))) (PP (IN by) (NP (DT the) (NN cell)))))))))) (. .)))