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Combination of haemoglobin with O(2) in ...

Combination of haemoglobin with `O_(2)` in lungs can be promoted by

A

Decreasing `O_(2)` concentration in blood

B

Increasin `O_(2)` concentration in air

C

Increasing `CO_(2)` concentration in air

D

Decreasing `CO_(2)` concentration in air.

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Concept of Diffusion:** - Diffusion is the process where molecules move from an area of higher concentration to an area of lower concentration. In the context of the lungs, this principle is crucial for gas exchange. 2. **Analyzing the Gas Exchange in the Lungs:** - In the lungs, the air in the alveoli is rich in oxygen (O2), while the blood in the capillaries is rich in carbon dioxide (CO2). This difference in concentration drives the diffusion process. 3. **Oxygen Diffusion into Blood:** - Since the concentration of O2 is higher in the alveoli than in the blood, O2 will diffuse from the alveoli into the blood. Conversely, CO2 will diffuse from the blood into the alveoli because its concentration is higher in the blood than in the alveoli. 4. **Impact of Decreasing O2 Concentration in Blood:** - If the concentration of O2 in the blood decreases, the gradient between the alveoli (high O2 concentration) and the blood (low O2 concentration) becomes steeper. This steeper gradient enhances the diffusion of O2 into the blood. 5. **Conclusion:** - Therefore, the combination of hemoglobin with O2 in the lungs can be promoted by decreasing the O2 concentration in the blood, as it increases the diffusion rate of O2 into the blood. **Final Answer:** The combination of hemoglobin with O2 in the lungs can be promoted by decreasing O2 concentration in blood. ---
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