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IB Biology HL C3.1.5 Spinal Cord Questions

Explore how spinal-cord grey matter integrates involuntary reflex pathways and how lesion evidence reveals links between the brain and peripheral nervous system in IB Biology HL C3.1.5.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain how the spinal cord links the brain and peripheral nervous system, using sensory-versus-motor lesion evidence.
  • Locate sensory-neuron/interneuron synapses in spinal-cord grey matter and relate this circuitry to unconscious reflex integration.

IB Biology HL C3.1.5 Spinal Cord Questions question 1

[Maximum number: 1]

The spinal cord is involved in the coordination of involuntary actions such as the pain reflex.

Where are synapses between sensory neurons and interneurons found?

Figure for Question IB Biology HL C3.1.5 Spinal Cord Questions question 1 — IB Biology HL
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