( ( ( The ( plasma membrane ) ) ( of ( a muscle ) ) ) ( ( cell 5 ) . ) )
(ROOT (S (NP (NP (DT The) (NN plasma) (NN membrane)) (PP (IN of) (NP (DT a) (NN muscle)))) (VP (VBZ cell) (NP (CD 5))) (. .)))
The plasma membrane of a muscle cell 5.
(ROOT (S (NP (DT The) (NN plasma) (NN membrane)) (VP (VBZ controls) (SBAR (WHNP (WP what)) (S (VP (VBZ goes) (PRT (RP in) (CC and) (RP out)) (PP (IN of) (NP (DT a) (NN cell))))))) (. .)))
The plasma membrane controls what goes in and out of a cell.