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The diagram shows the direction of oxygen transfer from red blood cells to body cells - OCR Gateway - GCSE Biology - Question 3 - 2019 - Paper 1
Question 3
The diagram shows the direction of oxygen transfer from red blood cells to body cells. What process does the arrow show? A. Active transport B. Diffusion C. Osmosis... show full transcript
Worked Solution & Example Answer:The diagram shows the direction of oxygen transfer from red blood cells to body cells - OCR Gateway - GCSE Biology - Question 3 - 2019 - Paper 1
Step 1
What process does the arrow show?
Answer
The process shown by the arrow in the diagram is Diffusion.
Diffusion is the movement of oxygen from an area of higher concentration, which is inside the red blood cells, to an area of lower concentration, which is within the body cells. This movement occurs across the capillary wall.
In biological systems, diffusion is critical for gas exchange; oxygen diffuses from the bloodstream to the tissues where it is utilized for cellular respiration.