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What is the shape of O(2) dissociation ...

What is the shape of `O_(2)` dissociation curve for haemoglobin ?

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It is sigmoid or 'S' shaped .
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AAKASH INSTITUTE-BREATHING AND EXCHANGE OF GASES -Try Yourself
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  3. How many layers form the diffusion membrane ?

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  18. why is surface area for exchange of gases decreased during Emphysema ?

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