This topic summary covers Knowledge Organiser within Temperature Regulation for GCSE Biology. Topic 5: Temperature Regulation It is section 11 of 12 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 11 of 12
Practice
15 questions
Recall
20 flashcards
Knowledge Organiser
Too Hot Responses
- Vasodilation — vessels widen, more blood near surface, heat lost by radiation
- Sweating — evaporation of sweat removes heat energy from skin
- Hairs lie flat — reduced insulating air layer
Too Cold Responses
- Vasoconstriction — vessels narrow, less blood near surface, less heat lost
- Shivering — muscle contractions generate heat via respiration
- Hairs stand up — traps insulating air layer
- Coordination centre — hypothalamus (brain)
- Optimum temperature — 37°C (for enzyme activity)
- Cooling mechanism — evaporation, NOT sweating itself