( It ( ( ( ( is ( embedded ( in ( ( a ( nerve ( cell 's ) ) ) membrane ) ) ) ) and ) ( ( serves ( as ( ( a sort ) ( of ( biological antenna ) ) ) ) ) ( to ( ( ( pick up ) signals ) ( from ( other ( nerve cells ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VP (VBZ is) (VP (VBN embedded) (PP (IN in) (NP (NP (DT a) (NN nerve) (NN cell) (POS 's)) (NN membrane))))) (CC and) (VP (VBZ serves) (PP (IN as) (NP (NP (DT a) (NN sort)) (PP (IN of) (NP (JJ biological) (NN antenna))))) (S (VP (TO to) (VP (VB pick) (PRT (RP up)) (NP (NNS signals)) (PP (IN from) (NP (JJ other) (NN nerve) (NNS cells)))))))) (. .)))
It is embedded in a nerve cell's membrane and serves as a sort of biological antenna to pick up signals from other nerve cells.
(ROOT (S (NP (JJ Biological) (NNS membranes)) (VP (VP (VBP surround) (NP (NNS cells))) (CC and) (VP (VBP serve) (S (VP (TO to) (VP (VB keep) (NP (NP (DT the) (NNS insides)) (VP (VBN separated) (PP (IN from) (NP (DT the) (NNS outsides)))))))))) (. .)))