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Homeostasis and negative feedback

Homeostasis and negative feedback

Homeostasis maintains a stable internal environment, including temperature, blood glucose concentration and water content, within narrow limits around a set point. This keeps conditions suitable for enzyme-controlled metabolic reactions and normal cell function.

3.3 Maintaining internal environments Lesson

  1. GCSE
  2. /Biology
  3. /3.3 Maintaining internal environments

Step-by-step lessons on OCR GCSE Biology 3.3 Maintaining internal environments, covering 3.3.1 Importance of a constant internal environment, 3.3.2 The skin and body temperature, 3.3.3 Insulin and blood sugar, 3.3.4 Glucagon and blood sugar, 3.3.5 Type 1 and type 2 diabetes, 3.3.6 Osmotic changes in body fluids, 3.3.7 Kidneys and water balance, 3.3.8 Structure of the kidney and tubule, 3.3.9 ADH and kidney tubule permeability, and 3.3.10 Responses to temperature and osmotic challenges. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.

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