Oxygen binding to haemoglobin is:
Correct answer: C. Inversely proportional to CO2 concentration
- A. Directly proportional to CO2 concentration
- B. Indirectly proportional to CO2 concentration
- C. Inversely proportional to CO2 concentration
- D. Independent of CO2 concentration
Explanation
The correct answer is d) Independent of CO2 Concentration. Oxygen binding to hemoglobin is influenced by factors like partial pressure of oxygen (PO2), pH, and temperature. While CO2 concentration does have some effect through its influence on pH (Bohr effect), the relationship is not straightforward or linear.
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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