( ( ( The consequences ) ( of ( ( renal ( functional impairment ) ) ( on ( aluminum ( ( -LRB- ( Al -RRB- ) ) excretion ) ) ) ) ) ) ( ( ( ( are not ) clear ) ( inasmuch ( as ( little ( is ( known ( about ( ( ( ( ( ( its ( glomerular filtration ) ) , ) ( tubular reabsorption ) ) , ) or ) secretion ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS consequences)) (PP (IN of) (NP (NP (JJ renal) (JJ functional) (NN impairment)) (PP (IN on) (NP (JJ aluminum) (PRN (-LRB- -LRB-) (NP (NNP Al)) (-RRB- -RRB-)) (NNS excretion)))))) (VP (VBP are) (RB not) (ADJP (JJ clear)) (SBAR (ADVP (RB inasmuch)) (IN as) (S (NP (RB little)) (VP (VBZ is) (VP (VBN known) (PP (IN about) (NP (NP (PRP$ its) (NN glomerular) (NN filtration)) (, ,) (NP (JJ tubular) (NN reabsorption)) (, ,) (CC or) (NP (NN secretion))))))))) (. .)))
The consequences of renal functional impairment on aluminum (Al) excretion are not clear inasmuch as little is known about its glomerular filtration, tubular reabsorption, or secretion.
(ROOT (S (NP (NP (DT The) (JJ main) (NNS functions)) (PP (IN of) (NP (NN epithelia)))) (VP (VBP are) (NP (NP (NN protection)) (PP (IN from) (NP (NP (DT the) (NN environment) (, ,) (NN coverage) (, ,) (NN secretion) (CC and) (NN excretion)) (, ,) (NP (NN absorption)) (, ,) (CC and) (NP (NN filtration)))))) (. .)))