This deep dive covers Homeostasis Definition within Temperature Regulation for GCSE Biology. Topic 5: Temperature Regulation It is section 2 of 13 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Homeostasis Definition
Homeostasis = the regulation of the internal conditions of a cell or organism to maintain optimum conditions for function, in response to internal and external changes.
What needs to be controlled:
- Body temperature: Enzymes work best at 37°C — too hot they denature, too cold reactions are too slow
- Blood glucose concentration: Cells need glucose for respiration but too much damages cells
- Water levels: Cells need the right amount of water for reactions; maintains osmotic balance
Practice questions for Temperature Regulation
What is the normal core body temperature in humans?
Explain how sweating helps to reduce body temperature.
Quick recall flashcards
How does sweating cool the body?
Sweat glands release sweat onto the skin. As sweat evaporates, it takes heat energy away from the skin, cooling the body. More sweating occurs when the body is too hot.
What is thermoregulation?
Thermoregulation is the process of maintaining a constant core body temperature of 37°C, regardless of changes in the external environment.