D3.3.7 (HL)—Kidney role
The kidney maintains homeostasis by filtering blood, removing wastes and regulating water, ions and solute concentration in human physiology in human physiology.
- Syllabus
- First assessment 2025
- Objective
- D3.3.7
- Level
- HL
Exam analysis
Chance of appearing11%of analysed past papers
Latest appearanceNovember 2023
Most common paperPaper2
Typical marks1–8
Common command terms
- Explain
- State
- Deduce
- Outline
- Identify
Recent exam appearances
November 2023Paper2 ["HL"] · TZ26(b)[ 5 ]D3.3.7 (HL)—Kidney role
November 2023Paper1 ["HL"] · TZ238[ 1 ]D3.3.7 (HL)—Kidney role
May 2023Paper2 ["HL"] · TZ22(d)[ 3 ]D3.3.7 (HL)—Kidney role
November 2022Paper1 ["HL"] · TZ038[ 1 ]D3.3.7 (HL)—Kidney role
May 2022Paper2 ["HL"] · TZ28(b)[ 7 ]D3.3.7 (HL)—Kidney role
Practice this objective
Coverage 2013–2023 · Updated 16 Jul 2026
Concept essentials
- Kidneys remove wastes while conserving useful substances.
- Filtration produces filtrate from blood plasma in nephrons.
- Selective reabsorption returns needed substances to the blood.