O-LevelBiologyCoordination & Response5090/11 · May/June 2015 · Q201 Mark

When the temperature of the air is higher than body temperature, which of these control mechanisms can help to maintain a constant body temperature?

Aconstriction of blood vessels in skin: occurs, shivering: occurs, sweating: occurs

Bconstriction of blood vessels in skin: occurs, shivering: does not occur, sweating: occurs

Cconstriction of blood vessels in skin: does not occur, shivering: does not occur, sweating: does not occur

Dconstriction of blood vessels in skin: does not occur, shivering: does not occur, sweating: occurs

✓ Correct answer

D: constriction of blood vessels in skin: does not occur, shivering: does not occur, sweating: occurs

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2015 Paper 1 Variant 1, question 20.

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