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IB Biology SL C3.1.5 Spinal Cord Questions

Explore how the spinal cord connects brain and peripheral pathways, separates sensory and motor outcomes after lesions, and integrates reflex synapses in IB Biology SL C3.1.5.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain how the spinal cord links the brain with peripheral sensory and motor pathways, using lesion evidence that separates sensation from movement.
  • Locate spinal-cord grey-matter synapses and explain how the cord integrates an unconscious reflex response.

IB Biology SL 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 SL C3.1.5 Spinal Cord Questions question 1 — IB Biology SL

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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