Important factors which affect the capacity of haemoglobin to combine with oxygen is
Correct answer: D. All of these
- A. Temperature
- B. Carbon dioxide
- C. pH
- D. All of these
Explanation
Temperature, carbon dioxide concentration and pH all affect haemoglobin's affinity for oxygen. Increased temperature, carbon dioxide and acidity generally promote oxygen unloading from haemoglobin, so students who select only pH overlook the effects of the other two factors.
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About Human Respiratory System
The human respiratory system conducts air to the alveoli, where oxygen and carbon dioxide exchange occurs across thin respiratory surfaces. Questions cover the nasal passage, trachea, bronchi, lungs, diaphragm and intercostal muscles, ventilation mechanics and gas transport, while distinguishing breathing and gaseous exchange from cellular respiration.
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