What would be the site of the given reaction if it proceeds from right to left?CO2 + H2O⇌ H2CO3⇌ H+ + HCO-3
Correct answer: A. Lungs
- A. Lungs
- B. Trachea
- C. Body tissue
- D. Diaphragm
Explanation
The correct answer is the lungs. In the context of respiratory physiology, the lungs play a crucial role in gas exchange. The reaction proceeding from right to left implies a shift in the equilibrium towards the loading of oxygen and unloading of carbon dioxide, which primarily occurs in the alveoli of the lungs. Conversely, in body tissues, the reaction usually proceeds from left to right, where oxygen is consumed and carbon dioxide is produced. The trachea are merely conduits for air and do not partake in the gas exchange process. Diaphragm is a muscle assissting inhalation and exhalation.
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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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