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C3.1.6—Input through sensory neurons

Input through sensory neurons links named stimuli, coordinating structures and effectors so body systems or plant tissues produce an integrated biological response.

Syllabus
First assessment 2025
Objective
C3.1.6
Level
SL

Exam analysis

Chance of appearing3%of analysed past papers
Latest appearanceNovember 2024
Most common paperPaper1
Typical marks1–2

Common command terms

  • Identify
  • Outline

Scoring notes

Common mistake
Giving a general body-system answer without the specific pathway step for sensory neuron input pathway.

Recent exam appearances

November 2024Paper3 ["SL"] · TZ16(c)[ 1 ]C3.1.6—Input through sensory neurons
November 2011Paper3 ["SL"] · TZ0E2(b)[ 2 ]C3.1.6—Input through sensory neurons
November 2011Paper1 ["SL"] · TZ025[ 1 ]C3.1.6—Input through sensory neurons
May 2011Paper1 ["SL"] · TZ213[ 1 ]C3.1.6—Input through sensory neurons
Practice this objective

Coverage 2011–2024 · Updated 16 Jul 2026

Concept essentials

  • Input through sensory neurons depends on linking the stimulus to the coordinating structure or signal.
  • The pathway for input through sensory neurons must keep information flow and response direction clear.
  • Named tissues, hormones, neurons or effectors give input through sensory neurons its biological specificity.
  • Evidence about input through sensory neurons is strongest when structure, mechanism and outcome are connected.
ConceptIB Biology SL