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B3.3 Muscle and motility [HL only]

Muscle and motility connect sarcomere contraction, antagonistic muscles, skeletons, synovial joints and locomotor adaptations to movement across biological scales efficiently.

Syllabus
First assessment 2025
Topic
B3.3
Level
—

What you’ll learn

10 learning objectives

Choose one objective for a focused lesson, or study the complete topic.

Exam analysis

An aggregate view of how the complete B3.3 Muscle and motility [HL only] appears across past papers.

Chance of appearing23%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1

Most tested objectives

  1. B3.3.2 (HL)—Sliding filament model44 questions
  2. B3.3.6 (HL)—Synovial joint movement14 questions
  3. B3.3.3 (HL)—Titin and antagonistic muscles11 questions

Common question formats

  • Diagram interpretation
  • Process explanation
  • Comparison
  • Definition or recall
  • Structured response

Exam question appearances

November 2025Paper2 ["HL"] · TZ13(c)[ 2 ]B3.3.3 (HL)—Titin and antagonistic muscles
November 2025Paper2 ["HL"] · TZ13(b)[ 3 ]B3.3.2 (HL)—Sliding filament model
November 2025Paper1A ["HL"] · TZ323[ 1 ]B3.3.3 (HL)—Titin and antagonistic muscles
May 2025Paper1B ["HL"] · TZ34(c)[ 2 ]B3.3.5 (HL)—Skeletons as anchorage and levers
May 2025Paper1B ["HL"] · TZ34(b)[ 3 ]B3.3.7 (HL)—Range of motion
Practice this topic

4 original exam-style questions based on the patterns above.

Coverage 2010–2025 · Updated 15 Jul 2026

Study checklistB3.3 Muscle and motility [HL only]