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IB Biology SL C3.1.9 Pain Reflex Arcs Questions

Explore receptor, sensory, relay and motor-neuron pathways through the spinal cord, and explain rapid skeletal-muscle withdrawal in IB Biology SL C3.1.9.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • List the sequence of receptor, sensory neuron, relay neuron, motor neuron and skeletal-muscle effector in a pain-withdrawal reflex arc.
  • Explain how sensory, relay and motor neurons transmit a rapid involuntary response through the spinal cord.

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Study C3.1.9—Pain reflex arcs conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology SL C3.1.9 Pain Reflex Arcs Questions question 1

[Maximum number: 4]

Draw a labelled diagram of a reflex arc for a pain withdrawal reflex.

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