( ( In summary ) ( , ( ( the kidneys ) ( partially ( ( ( compensate ( for ( respiratory acidosis ) ) ) ( by ( raising ( blood bicarbonate ) ) ) ) . ) ) ) ) )
(ROOT (S (PP (IN In) (NP (NN summary))) (, ,) (NP (DT the) (NNS kidneys)) (ADVP (RB partially)) (VP (VB compensate) (PP (IN for) (NP (JJ respiratory) (NNS acidosis))) (PP (IN by) (S (VP (VBG raising) (NP (NN blood) (NN bicarbonate)))))) (. .)))
In summary, the kidneys partially compensate for respiratory acidosis by raising blood bicarbonate.
(ROOT (S (NP (JJ Respiratory) (NNS acidosis)) (VP (VBZ is) (VP (VBN considered) (S (VP (TO to) (VP (VB be) (ADJP (JJ problematic) (PP (IN because) (NP (NP (JJ excess) (NNS co2)) (PP (IN in) (NP (NN blood))))))))))) (. .)))