O-LevelBiologyRespiration5090/11 · Oct/Nov 2025 · Q151 Mark
During vigorous exercise, lactic acid builds up in the muscles. Blood leaving these muscles will have a high concentration of lactic acid. Which process removes most of the lactic acid from the blood?
AIt is broken down in the liver.
BIt is excreted during sweating.
CIt is expired during faster breathing.
DIt is oxidised to release energy in muscles.
✓ Correct answer
A: It is broken down in the liver.
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