D3.3 Homeostasis
Homeostasis maintains internal conditions through feedback control of blood pH, glucose, temperature, kidney filtration, osmoregulation and blood flow in human physiology.
- Syllabus
- First assessment 2025
- Topic
- D3.3
- Level
- SL
What you’ll learn
6 learning objectivesChoose one objective for a focused lesson, or study the complete topic.
Exam analysis
An aggregate view of how the complete D3.3 Homeostasis appears across past papers.
Chance of appearing30%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper2
Most tested objectives
- D3.3.3—Blood glucose regulation26 questions
- D3.3.4—Diabetes24 questions
- D3.3.1—Homeostasis definition5 questions
Common question formats
- Definition or recall
- Process explanation
- Data analysis
- Diagram interpretation
- Calculation
- Structured response
Exam question appearances
November 2025Paper2 ["SL"] · TZ16(c)[ 4 ]D3.3.1—Homeostasis definition
November 2025Paper2 ["SL"] · TZ16(b)[ 7 ]D3.3.3—Blood glucose regulation
November 2025Paper2 ["SL"] · TZ16(a)[ 4 ]D3.3.2—Negative feedback loops
November 2025Paper1A ["SL"] · TZ121[ 1 ]D3.3.6—Thermoregulation mechanisms
May 2025Paper1A ["SL"] · TZ322[ 1 ]D3.3.6—Thermoregulation mechanisms
Coverage 2010–2025 · Updated 16 Jul 2026