How are the alveoli designed to maximise the exchange of gases?
How are the alveoli designed to maximise the exchange of gases?
Solution and Explanation
The alveoli are the small balloon-like structures present in the lungs. The walls of the alveoli consist of an extensive network of blood vessels. Each lung contains 300−350 million alveoli, making it a total of approximately 700 million in both lungs. The alveolar surface when spread out covers about 80 m2 area. This large surface area makes the gaseous exchange more efficient.
Top Questions on Life Science
Match the standard/stated cofactors in Column I with their respective enzymes in Column II
- GATE XL - 2023
- Life Science
- Life Science
Match the immunological statements in Column I with the appropriate descriptions from Column II.
- GATE XL - 2023
- Life Science
- Life Science
Match the syndromes listed in Column I with the cause/symptoms listed in Column II.
- GATE XL - 2023
- Life Science
- Life Science
Match the hormones/precursors listed in Column I with their chemical type in Column II and the tissue of origin listed in Column III.
- GATE XL - 2023
- Life Science
- Life Science
- During the exponential growth, it took 6 hours for the population of bacterial cells to increase from \(2.5 \times 10^6\) to \(5 \times 10^{8}\). The generation time of the bacterium, rounded off to the nearest integer, is _______ minutes.
- GATE XL - 2023
- Life Science
- Life Science
Questions Asked in CBSE X exam
- Identify and correct the error in the sentence taken from the article – ‘The Hidden Health Risks of Bread Consumption’:
Health experts worldwide are concerning about the surge in health problems.
Error Correction- CBSE Class X - 2025
- Error Correction
- Describe the historical factors that contributed to the emergence of nationalist tensions in the Balkans.
- CBSE Class X - 2025
- The Rise of Nationalism in Europe
In the adjoining figure, \( AP = 1 \, \text{cm}, \ BP = 2 \, \text{cm}, \ AQ = 1.5 \, \text{cm}, \ AC = 4.5 \, \text{cm} \) Prove that \( \triangle APQ \sim \triangle ABC \).
Hence, find the length of \( PQ \), if \( BC = 3.6 \, \text{cm} \).
- CBSE Class X - 2025
- Triangles
- Imagine you are a part of a 'Self Help Group' (SHG). Explain the working system of the Self Help Group (SHG) to the new member.
- CBSE Class X - 2025
- Money and Credit
In the adjoining figure, $\triangle CAB$ is a right triangle, right angled at A and $AD \perp BC$. Prove that $\triangle ADB \sim \triangle CDA$. Further, if $BC = 10$ cm and $CD = 2$ cm, find the length of AD.
- CBSE Class X - 2025
- Geometry