O-LevelBiologyRespiration5090/12 · Oct/Nov 2014 · Q181 Mark

At the end of a 100 m sprint, how will blood passing through the leg muscles be different from the blood at the start of the race?

Acarbon dioxide concentration higher, lactic acid concentration higher, temperature higher

Bcarbon dioxide concentration higher, lactic acid concentration lower, temperature lower

Ccarbon dioxide concentration lower, lactic acid concentration higher, temperature lower

Dcarbon dioxide concentration lower, lactic acid concentration lower, temperature higher

✓ Correct answer

A: carbon dioxide concentration higher, lactic acid concentration higher, temperature higher

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Topic: Respiration, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2014 Paper 1 Variant 2, question 18.

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