Biology for IGCSE & O level - Gas Exchange In Humans (Section 3 - No. 43)
What is the relationship between breathing rate and metabolic rate?
As metabolic rate increases, breathing rate decreases.
As metabolic rate decreases, breathing rate increases.
Breathing rate and metabolic rate are unrelated.
As metabolic rate increases, breathing rate increases.
Explanation
A higher metabolic rate requires more oxygen and produces more carbon dioxide, so breathing rate increases to facilitate gas exchange.
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