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IB Biology SL 3.1.5 Spinal cord Question Bank

Practise IB Biology SL 3.1.5 by identifying spinal-cord structures and explaining their role in reflex coordination.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Identify the brain and spinal cord as the two parts of the central nervous system.
  • Explain how spinal-cord synapses coordinate involuntary reflex actions.

C3.1.5—Spinal cord 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 C3.1.5—Spinal cord 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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