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
- HL
What you’ll learn
11 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 appearing51%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper2
Most tested objectives
- D3.3.10 (HL)—Osmoregulation by collecting ducts18 questions
- D3.3.4—Diabetes14 questions
- D3.3.7 (HL)—Kidney role12 questions
Common question formats
- Definition or recall
- Process explanation
- Data analysis
- Diagram interpretation
- Calculation
- Structured response
Exam question appearances
November 2025Paper2 ["HL"] · TZ19(b)[ 7 ]D3.3.3—Blood glucose regulation
November 2025Paper1A ["HL"] · TZ331[ 1 ]D3.3.6—Thermoregulation mechanisms
May 2025Paper2 ["HL"] · TZ18(c)[ 7 ]D3.3.10 (HL)—Osmoregulation by collecting ducts
May 2025Paper1A ["HL"] · TZ332[ 1 ]D3.3.11 (HL)—Blood supply changes
May 2025Paper1A ["HL"] · TZ130[ 1 ]D3.3.3—Blood glucose regulation
Practice this topic
17 original exam-style questions based on the patterns above.
Coverage 2012–2025 · Updated 16 Jul 2026