( ( ( Feedback , ) ( ( ( ( positive feedback ) , ) and ) ( negative feedback ) ) ) . )
(ROOT (NP (NP (NN Feedback)) (, ,) (NP (NP (JJ positive) (NN feedback)) (, ,) (CC and) (NP (JJ negative) (NN feedback))) (. .)))
Feedback, positive feedback, and negative feedback.
(ROOT (S (NP (JJ Positive) (NN feedback)) (VP (VP (VBZ intensifies) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NP (DT the) (NN body) (POS 's)) (JJ physiological) (NN condition))))) (CONJP (RB rather) (IN than)) (VP (VBG reversing) (NP (PRP it)))) (. .)))