2026 · Q97
Which one of the following effects best explains the high partial pressure of carbon dioxide causing haemoglobin to release oxygen in actively respiring tissues?
general-sciencebiology-human-body
- AHaldane effect
- BAllee effect
- CBohr effect
- DEagle effect
Explanation
The Bohr effect describes how increased CO₂ (and the resulting lower pH) in actively respiring tissues reduces haemoglobin's affinity for oxygen, causing it to release oxygen where it is needed. The Haldane effect concerns CO₂ transport, while the Allee and Eagle effects are unrelated to haemoglobin. Hence option C is correct.