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GCSE Combined Science · key term
A protein in red blood cells that binds reversibly to oxygen.
Used by AQA and Edexcel
Specification 4.2.2.3 · Paper 1
Revise: BloodThe distinction between plasma and red blood cells is important: plasma transports many dissolved substances, but oxygen is mainly transported by haemoglobin inside red blood cells.
Specification Fuels · Paper 1, Paper 2, Paper 3, Paper 4
A protein in red blood cells that binds oxygen to form oxyhaemoglobin.
Revise: Blood and the Circulatory SystemRed blood cells, also called erythrocytes, contain haemoglobin. This protein binds oxygen in the lungs to form oxyhaemoglobin. Oxygen is then released to body tissues, where cells need it for aerobic respiration.
The protein in red blood cells that binds oxygen and transports it around the body.
Link each adaptation to its function: for example, no nucleus leaves more room for haemoglobin, so a red blood cell can carry more oxygen.
For carbon monoxide toxicity, link binding to haemoglobin to reduced oxygen transport to body tissues.
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