Start learning →

Lactic acid builds up in human muscles during:

Aanaerobic respiration
Baerobic respiration
Ctranspiration
Dphotosynthesis
Answer & Solution
Correct answer: A. anaerobic respiration
When oxygen supply is insufficient (sprint), pyruvate is converted to lactic acid via anaerobic respiration — the cause of muscle cramps.
Practise this question with Quill — AP Biology →

Keep practising Unit 8R: Environmental Pollution & Organismal Health

Browse all Unit 8R: Environmental Pollution & Organismal Health questions for AP Biology, or explore more Biology topics.

Start a Unit 8R: Environmental Pollution & Organismal Health lesson →