feedback system 80 Animals 44 article 40 priority journal 38 controlled study 36 human 34 nonhuman 34 Humans 32 animal 28 metabolism 28 Feedback 26 physiology 26 biological model 22 Feedback, Physiological 20 signal transduction 20 animal experiment 18 rat 18 Article 16 animal cell 16 protein expression 16 Neurons 14 female 14 genetics 14 male 14 nerve cell 14 unclassified drug 14 Biological Clocks 12 Female 12 Models, Biological 12 Rats 12