Homeostasis
The maintenance of stable internal conditions in organisms and ecosystems through regulatory mechanisms.
Real World
The human body maintains blood glucose at ~5 mmol/L; after a sugary drink, insulin released by the pancreas drives glucose into cells, returning levels to normal — a textbook negative feedback loop maintaining homeostasis.
Exam Focus
Link homeostasis explicitly to negative feedback in your answer; examiners expect the mechanistic connection, not just the definition.
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