Science (086) — AI-generated practice question

Reflex Action: Controlled by the spinal cord (reflex arc), without involvement of the brain. The response is automatic, rapid, and does not require conscious thinking (e.g., pulling hand away from flame).

Voluntary Action: Controlled by the fore-brain (cerebrum). It involves thinking, decision-making, and conscious control (e.g., writing, moving a chair).

Why mixing them up is harmful: In dangerous situations like touching a hot object, routing the signal through the brain for conscious thinking would take too long — enough time for serious injury. Reflex arcs evolved precisely because the brain's thinking process is not fast enough for urgent responses.

Source: Chapter 6, Sections 6.1.1 and 6.1.2

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• Examiners expect a clear distinction (2 marks) and a reason for the danger of voluntary control in reflex situations (1 mark).
• Key phrases to use: "spinal cord / reflex arc," "fore-brain / conscious thinking," and "not fast enough / delay causes harm."
• Avoid writing a long essay — this is 3 marks, so keep it tight and point-based.