D3.3.1—Homeostasis definition
Homeostasis maintains internal conditions within narrow limits, including blood pH, water balance, blood glucose and body temperature in human physiology.
- Syllabus
- First assessment 2025
- Objective
- D3.3.1
- Level
- HL
Exam analysis
Chance of appearing2%of analysed past papers
Latest appearanceNovember 2018
Most common paperPaper3
Typical marks1–6
Common command terms
- Explain
- Identify
- Outline
Recent exam appearances
November 2018Paper3 ["HL"] · TZ021[ 6 ]D3.3.1—Homeostasis definition
May 2017Paper3 ["HL"] · TZ219(iv)[ 1 ]D3.3.1—Homeostasis definition
Practice this objective
Coverage 2017–2018 · Updated 16 Jul 2026
Concept essentials
- Homeostasis keeps internal variables within narrow limits.
- Negative feedback restores variables toward a set point.
- Blood pH, water balance, glucose and temperature are common homeostatic variables.