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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…

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.

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Study C3.1.5—Spinal cord conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL C3.1.5 Spinal Cord Questions question 1

[Maximum number: 1]

The image shows a castor bean tick (Ixodes ricinus) which is commonly found in woodlands or forest areas. This tick can carry bacteria that cause Lyme disease in humans.

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

Some symptoms of Lyme disease are caused by damage to the central nervous system (CNS). State both parts of the CNS.
1.
2.

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