O-LevelBiologyCoordination & Response5090/11 · Oct/Nov 2012 · Q191 Mark

The diagrams show an athlete throwing a javelin. Which row describes the change in position of the right arm, and the action of the muscles involved, between stages 2 and 3?

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Aflexes, contract, relax

Bflexes, relax, contract

Cstraightens, contract, relax

Dstraightens, relax, contract

✓ Correct answer

D: straightens, relax, contract

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2012 Paper 1 Variant 1, question 19.

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