What is the role of haemoglobin in the blood?

Answer and explanation

Correct answer: B. It binds oxygen in the lungs, where the partial pressure is high, and releases it in respiring tissues

  1. Step 1: Haemoglobin has a high affinity for oxygen at high partial pressure. Step 2. It unloads where the pressure is low. Answer: it carries oxygen. Why not the others: these are other proteins or functions.

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