IB Biology SL 3.1.9 Reflex arcs Question Bank
Practise IB Biology SL 3.1.9 by tracing the components and direction of a spinal reflex arc.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- List the sequence of structures in a pain-withdrawal reflex arc.
- Explain the roles of sensory, relay and motor neurons in a reflex response.
C3.1.9—Pain reflex arcs question 1
[Maximum number: 4]
Draw a labelled diagram of a reflex arc for a pain withdrawal reflex.
Award [1] for any one of the following clearly drawn and correctly labelled:
Spinal cord showing white and grey matter.
Spinal nerves showing dorsal and ventral roots.
Sensory neuron / receptor.
Motor neuron / effector.
Relay neuron.
Arrows showing path from stimulus/receptor to response/effector.
A verified official answer image is still needed because this answer requires diagram/spatial placement.
Preserve all accept/do not accept/award/both-needed/max guidance from the official markscheme.
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