An increase in carbon dioxide concentration makes haemoglobin release oxygen more readily. This is known as
Correct answer: C. the Bohr effect
- A. the chloride shift
- B. the countercurrent effect
- C. the Bohr effect
- D. the induced fit effect
Explanation
Carbon dioxide lowers the pH of the blood, which alters the shape of haemoglobin and reduces its affinity for oxygen, shifting the dissociation curve to the right. The benefit is that the most active tissues, which produce the most carbon dioxide, automatically receive the most oxygen. The chloride shift is the separate movement of chloride ions into the red cell to balance the loss of hydrogen carbonate.
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About Gaseous Exchange in Lungs
Gaseous exchange in the lungs occurs across the thin, moist alveolar and capillary surfaces, where oxygen and carbon dioxide diffuse down partial pressure gradients. The topic covers alveolar adaptations, ventilation, the role of haemoglobin in oxygen transport, carbon dioxide carriage, and the difference between external gas exchange and cellular respiration.
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