In respiring tissues, the steep part of the curve means

  1. haemoglobin cannot release oxygen
  2. CO₂ is released
  3. a small fall in pO₂ releases a large amount of oxygen
  4. haemoglobin is always saturated
Answer

C) a small fall in pO₂ releases a large amount of oxygen

Unloading is efficient. AS & A Level Biology · Topic 8 Transport in Mammals · 8.2 Transport of oxygen and carbon dioxide

Biology MCQ · More A Level Biology: Transport in mammals MCQs · Practise