O-LevelBiologyCoordination & Response5090/12 · May/June 2019 · Q211 Mark

Which statement describes a simple reflex action involving an arm or leg?

AIt does not involve the brain or spinal cord.

BIt involves the spinal cord, and the brain is informed as to what has happened.

CIt involves the spinal cord, without any information passing to the brain.

DThe response is caused by nerve impulses from the brain.

✓ Correct answer

B: It involves the spinal cord, and the brain is informed as to what has happened.

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2019 Paper 1 Variant 2, question 21.

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