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 plasma Surface area to volume ratio Nucleus present A Large Small Yes B Short Large No C Short Large No D Large Large No Which row in the table shows how red blood cells are adapted for transport of oxygen?

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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%

104 rated

Answer

Red blood cells have a large surface area to volume ratio, facilitating faster absorption of oxygen.

Step 3

Nucleus present

96%

101 rated

Answer

Red blood cells lack a nucleus, providing more space for haemoglobin and allowing for maximum oxygen transport capacity.

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The diagram shows a red blood cell - OCR Gateway - GCSE Biology - Question 13 - 2018 - Paper 1

Worked Solution & Example Answer:The diagram shows a red blood cell - OCR Gateway - GCSE Biology - Question 13 - 2018 - Paper 1

Distance oxygen travels to get to haemoglobin from blood plasma

Surface area to volume ratio

Nucleus present

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