C3.1.1—System integration
System integration links named stimuli, coordinating structures and effectors so body systems or plant tissues produce an integrated biological response.
- Syllabus
- First assessment 2025
- Objective
- C3.1.1
- Level
- SL
Exam analysis
Chance of appearing1%of analysed past papers
Latest appearanceMay 2017
Most common paperPaper3
Typical marks3
Common command terms
- Identify
- Explain
Scoring notes
- Common mistake
- Naming a brain region without linking it to information integration or coordination.
Recent exam appearances
May 2017Paper3 ["SL"] · TZ29(a)[ 3 ]C3.1.1—System integration
Practice this objective
Coverage 2017–2017 · Updated 16 Jul 2026
Concept essentials
- System integration depends on linking the stimulus to the coordinating structure or signal.
- The pathway for system integration must keep information flow and response direction clear.
- Named tissues, hormones, neurons or effectors give system integration its biological specificity.
- Evidence about system integration is strongest when structure, mechanism and outcome are connected.