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Assertion (A): Alveoli play a crucial role in the exchange of oxygen and carbon dioxide in the lungs.
Reason (R):
The efficiency of gas exchange in alveoli is influenced by the thickness of the alveolar membrane.
  • a)
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b)
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
  • c)
    If Assertion is true but Reason is false
  • d)
    If both Assertion and Reason are false
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Assertion (A): Alveoli play a crucial role in the exchange of oxygen a...
  • Assertion (A) is true because alveoli are indeed the primary sites for gas exchange in the respiratory system, facilitating the transfer of oxygen into the blood and the removal of carbon dioxide.
  • Reason (R) is also true; the thickness of the alveolar membrane affects diffusion rates, with thinner membranes generally allowing for more efficient gas exchange.
  • Furthermore, the reason correctly explains the assertion, as a thinner alveolar membrane enhances the efficiency of gas exchange, thereby supporting the assertion about the role of alveoli.
Topic in NCERT: Gas Exchange and Diffusion Factors
Line in NCERT: "Rate of diffusion is dependent on the partial pressure gradients of O2 (pO2) and CO2 (pCO2), their solubility as well as the thickness of the diffusion surface."
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Community Answer
Assertion (A): Alveoli play a crucial role in the exchange of oxygen a...
Understanding the Assertion and Reason
The statement revolves around the function of alveoli and the factors affecting gas exchange in the lungs.
Assertion (A)
- Alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs.
- They provide a large surface area and are surrounded by capillaries, facilitating efficient gas exchange.
Reason (R)
- The thickness of the alveolar membrane plays a critical role in the efficiency of this gas exchange.
- A thinner membrane allows gases to diffuse more easily, enhancing the overall process of respiration.
Analysis of the Relationship
- Both the assertion and reason are true statements about the respiratory system.
- The reason directly explains why the assertion is valid: thinner membranes result in a more efficient gas exchange process.
Conclusion
- Since both the assertion and reason are true, and the reason correctly explains the assertion, the correct answer is option 'A'.
- Understanding this relationship is crucial for grasping respiratory physiology, especially for exams like NEET where such concepts are frequently tested.
Key Takeaways
- Alveoli are essential for gas exchange.
- The thickness of the alveolar membrane directly influences gas exchange efficiency.
- Both statements are interconnected and support the functioning of the respiratory system.
This understanding is vital for medical studies and helps in grasping the intricacies of human physiology.
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Assertion (A): Alveoli play a crucial role in the exchange of oxygen and carbon dioxide in the lungs. Reason (R): The efficiency of gas exchange in alveoli is influenced by the thickness of the alveolar membrane.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertion b)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'A'. Can you explain this answer?
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