CBSE Class 11-science Answered
A: exchange of O2 and CO2 occurs by active transport
R: rate of diffusion does not depend on the partial pressure of O2 and CO2
Asked by arushidabhade | 05 Aug, 2019, 07:46: PM
Expert Answer
- Both assertion and reason are false.
- Gases are exchanged between the alveolar air and the blood by diffusion.
- The rate of diffusion is determined by partial pressure gradients across the respiratory membrane in our lungs. Partial pressure is a function of both concentration and atmospheric pressure.
- The partial pressure for oxygen is much greater than that of carbon dioxide.
Answered by Sheetal Kolte | 06 Aug, 2019, 10:51: AM
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