The diagram shows a red blood cell - OCR Gateway - GCSE Biology - Question 13 - 2018 - Paper 1
Question 13
The diagram shows a red blood cell.
Cell membrane
0.0070 mm
Cytoplasm containing haemoglobin
0.0025 mm
Distance oxygen travels to get to haemoglobin from blood ... show full transcript
Worked Solution & Example Answer:The diagram shows a red blood cell - OCR Gateway - GCSE Biology - Question 13 - 2018 - Paper 1
Step 1
Distance oxygen travels to get to haemoglobin from blood plasma
96%
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Answer
Red blood cells have a short distance for oxygen to travel to reach haemoglobin, which allows for efficient gas exchange.
Step 2
Surface area to volume ratio
99%
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Answer
Red blood cells have a large surface area to volume ratio, facilitating faster absorption of oxygen.
Step 3
Nucleus present
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Answer
Red blood cells lack a nucleus, providing more space for haemoglobin and allowing for maximum oxygen transport capacity.
