C2.2.1—Neurons
Neurons are specialized cells with dendrites, cell bodies, axons and terminals arranged to receive, conduct and pass on nerve impulses.
- Syllabus
- First assessment 2025
- Objective
- C2.2.1
- Level
- SL
Exam analysis
Chance of appearing7%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper2
Typical marks1–3
Common command terms
- Label
- Draw
- State
- Distinguish
- Identify
Recent exam appearances
November 2025Paper1A ["SL"] · TZ111[ 1 ]C2.2.1—Neurons
May 2025Paper2 ["SL"] · TZ36(a)[ 2 ]C2.2.1—Neurons
May 2025Paper1B ["SL"] · TZ13(b)[ 1 ]C2.2.1—Neurons
November 2024Paper2 ["SL"] · TZ25(a)[ 3 ]C2.2.1—Neurons
November 2015Paper2 ["SL"] · TZ07(a)[ 5 ]C2.2.1—Neurons
Practice this objective
Coverage 2012–2025 · Updated 15 Jul 2026
Concept essentials
- Dendrites receive signals and conduct them toward the cell body.
- Axons conduct nerve impulses away from the cell body toward terminals.
- Sensory, relay and motor neurons form the main neuron types in reflex arcs.
- A spinal reflex arc links receptor, sensory neuron, relay neuron, motor neuron and effector.