O-LevelBiologyCoordination & Response5090/11 · May/June 2017 · Q231 Mark

The diagram shows some of the nerve pathways associated with a reflex action. If the pathway at X is damaged, how does this affect the reflex?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

AThe person will not be aware that the reflex is occurring.

BThe reflex cannot be controlled consciously.

CThe response will occur without any stimulus.

DThere is no response to the stimulus.

✓ Correct answer

B: The reflex cannot be controlled consciously.

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2017 Paper 1 Variant 1, question 23.

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