( ( The ( ( parasympathetic nervous ) system ) ) ( ( ( works ( through ( ( ( ( another ( second messenger ) ) , ) IP3 ) , ) ) ) ( to ( ( ( ( mobilize ( calcium ions ) ) ( inside ( the cell ) ) ) and ) ( eventually ( foster ( muscle contraction ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (ADJP (JJ parasympathetic) (JJ nervous)) (NN system)) (VP (VBZ works) (PP (IN through) (NP (NP (DT another) (JJ second) (NN messenger)) (, ,) (NP (NNP IP3)) (, ,))) (S (VP (TO to) (VP (VP (VB mobilize) (NP (NN calcium) (NNS ions)) (PP (IN inside) (NP (DT the) (NN cell)))) (CC and) (VP (ADVP (RB eventually)) (VB foster) (NP (NN muscle) (NN contraction))))))) (. .)))
The parasympathetic nervous system works through another second messenger, IP3, to mobilize calcium ions inside the cell and eventually foster muscle contraction.
(ROOT (S (NP (NNP Calcium) (NNP ion)) (VP (VBZ is) (NP (NP (DT an) (NN example)) (PP (IN of) (NP (DT a) (JJ second) (NN messenger))))) (. .)))
Calcium ion is an example of a second messenger.