Name the respiratory pigment in human beings that has a high affinity for oxygen.
Generated by claude-sonnet-4-6 · 2026-06-10 02:57 · grounding rag
Model Answer
Haemoglobin is the respiratory pigment in human beings. It is present in red blood corpuscles (RBCs) and has a high affinity for oxygen, helping transport oxygen to all body cells.
Source: Chapter 5, Section 5.4.1
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Explanation
- The examiner expects the name haemoglobin as the direct answer — that single word earns the mark.
- Adding that it is found in RBCs and transports oxygen shows understanding and is good practice for 1-mark answers.
- Do not confuse it with plasma, which transports CO₂ and food in dissolved form — that is a common mistake.