What is a sigmoid curve in relation to haemoglobin?

What is a sigmoid curve in relation to haemoglobin?
  1. A plot of saturation of haemoglobin with CO₂ against pCO₂
  2. A plot of saturation of haemoglobin with O₂ against pO₂
  3. A plot of saturation of haemoglobin with H⁺ concentration against pO₂
  4. A plot of saturation of haemoglobin with temperature against pO₂

Solution

A sigmoid curve is obtained when the percentage saturation of haemoglobin with O₂ is plotted against the partial pressure of O₂ (pO₂).

Asked in: NCERT

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