Biology · Paper 2 · Foundation + Higher · B5
Homeostasis is the regulation of internal conditions to maintain optimum conditions for cells and enzymes. It responds to changes inside and outside the body. Examples include control of blood glucose concentration, body temperature and water levels.
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Daily 5 · Exam practice · Revision sheet ↓
Foundation + Higher · B5. Nine core lessons, followed by four labelled Higher Tier lessons.
AQA Combined Science Trilogy 8464 · 4.5.1. Original notes, questions and diagrams. Models are simplified; teaching data are illustrative.