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D3.3.6—Thermoregulation mechanisms

Thermoregulation mechanisms include sweating, vasodilation, vasoconstriction, shivering and changes in skin blood flow in human physiology in human physiology in human physiology.

Syllabus
First assessment 2025
Objective
D3.3.6
Level
HL

Exam analysis

Chance of appearing4%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1
Typical marks1

Common command terms

  • Identify
  • Outline

Recent exam appearances

November 2025Paper1A ["HL"] · TZ331[ 1 ]D3.3.6—Thermoregulation mechanisms
May 2025Paper2 ["HL"] · TZ32(a)(i)[ 1 ]D3.3.6—Thermoregulation mechanisms
May 2015Paper1 ["HL"] · TZ234[ 1 ]D3.3.6—Thermoregulation mechanisms
May 2014Paper1 ["HL"] · TZ227[ 1 ]D3.3.6—Thermoregulation mechanisms
May 2012Paper1 ["HL"] · TZ224[ 1 ]D3.3.6—Thermoregulation mechanisms
Practice this objective

Coverage 2012–2025 · Updated 16 Jul 2026

Concept essentials

  • Evaporation of sweat removes heat from the body.
  • Vasodilation increases heat loss through the skin.
  • Vasoconstriction and shivering help maintain temperature when cold.
ConceptIB Biology HL