( ( The ( next step ) ) ( ( is ( to ( ( ( ( connect ( this ( muscle cell ) ) ) ( to ( ( the ( six neurons ) ) ( which ( synapse ( on it ) ) ) ) ) ) and ) ( approximate ( their effect ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ next) (NN step)) (VP (VBZ is) (S (VP (TO to) (VP (VP (VB connect) (NP (DT this) (NN muscle) (NN cell)) (PP (TO to) (NP (NP (DT the) (CD six) (NNS neurons)) (SBAR (WHNP (WDT which)) (S (VP (VBP synapse) (PP (IN on) (NP (PRP it))))))))) (CC and) (VP (JJ approximate) (NP (PRP$ their) (NN effect))))))) (. .)))
The next step is to connect this muscle cell to the six neurons which synapse on it and approximate their effect.
(ROOT (S (NP (NNP Synapse)) (VP (VBZ is) (NP (NP (DT the) (NN term)) (PP (IN for) (NP (NP (DT a) (NN connection)) (PP (IN between) (NP (NP (DT a) (NN neuron)) (CC and) (NP (PRP$ its) (NN target) (NN cell)))))))) (. .)))