alleryStart learning →What does hyperpnoea do to blood oxygen and carbon dioxide levels?
AIt lowers both of them well below normal
BIt raises both of them well above normal
CIt leaves both of them largely unchanged
DIt lowers oxygen while raising carbon dioxide
Answer & Solution
Correct answer: C. It leaves both of them largely unchanged
1. Hyperpnoea is an increased depth and rate of ventilation meeting an increase in oxygen demand.
2. Because the extra ventilation is matched to the extra demand, blood gases barely move.
3. It does not significantly alter blood oxygen or carbon dioxide levels.
4. That is exactly what separates it from hyperventilation, which does drive blood carbon dioxide down.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 22 "The Respiratory System", section 22.6 Modifications in Respiratory Functions_
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