Lesson: Chapter 6 — Human body processes

Cellular respiration 4 of 5 Reset answers

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Question 4

Why do leg muscles ache after a 100 m sprint?

A Lactic acid builds up from anaerobic respiration B They run out of water C Too much oxygen reaches them D Alcohol is made in them

The right answer is the one marked above.

Lactic acid builds up from anaerobic respiration. The muscles work faster than oxygen can reach them.

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