O-LevelBiologyCoordination & Response5090/11 · Oct/Nov 2016 · Q191 Mark

The diagram shows the bones and muscles of the elbow joint. [Figure 19.1] What describes the type of muscle at X, and the action of the muscle when the arm is being bent?

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Atype of muscle: extensor, action of the muscle: contracts

Btype of muscle: extensor, action of the muscle: relaxes

Ctype of muscle: flexor, action of the muscle: contracts

Dtype of muscle: flexor, action of the muscle: relaxes

✓ Correct answer

C: type of muscle: flexor, action of the muscle: contracts

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2016 Paper 1 Variant 1, question 19.

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