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GCSE Chemistry · key term
The protein in red blood cells that binds oxygen in the lungs and transports it around the body.
Used by Edexcel
Specification 8.9 · Paper 2
Revise: Carbon Monoxide ToxicityWhen carbon monoxide is breathed in, it passes from the lungs into the blood. Its toxicity then depends on how it interacts with haemoglobin, the oxygen-carrying protein in red blood cells.
Build the explanation as a causal chain: carbon monoxide binds strongly to haemoglobin → less oxygen is transported and released to cells → aerobic respiration is reduced.
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