Understanding Carbon Dioxide Removal by Lungs
The lungs play a crucial role in the respiratory system, particularly in gas exchange. The correct answer to how much carbon dioxide is removed by the lungs is option 'B', which is 200 mL/minute. Here’s a detailed explanation:
Gas Exchange Process
- The primary function of the lungs is to facilitate the exchange of gases: oxygen enters the blood, and carbon dioxide is removed.
- During respiration, air is drawn into the lungs, where oxygen is absorbed and carbon dioxide is released into the alveoli.
Quantifying Carbon Dioxide Removal
- On average, a healthy adult at rest inhales and exhales about 6 to 10 liters of air per minute.
- The concentration of carbon dioxide in exhaled air is approximately 4-5%, meaning that roughly 200 mL of carbon dioxide is expelled per minute.
Physiological Significance
- Efficient removal of carbon dioxide is crucial for maintaining the body’s pH balance and ensuring that metabolic processes function optimally.
- The lungs adjust the rate of carbon dioxide removal based on various factors, including physical activity, illness, or altitude.
Conclusion
- Recognizing that the lungs remove approximately 200 mL of carbon dioxide per minute highlights their vital role in respiratory health and overall well-being.
- This understanding can aid in preparing for examinations like NEET, where knowledge of physiological processes is essential.