O-LevelBiologyCoordination & Response5090/12 · Oct/Nov 2020 · Q211 Mark

What describes a reflex action?

AIt is a rapid response to a stimulus, involving the spinal cord.

BIt is a rapid response detected by motor neurones.

CIt is a slow response to a stimulus, involving the spinal cord.

DIt is a slow response detected by motor neurones.

✓ Correct answer

A: It is a rapid response to a stimulus, involving the spinal cord.

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2020 Paper 1 Variant 2, question 21.

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