Cell Size & SA:V Ratio
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4 Terms
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Why are cells small?
To maintain a high surface area to volume ratio, allowing fast diffusion of materials (like oxygen, glucose, and waste) across the cell membrane.
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What happens to the SA:V ratio as a cell gets larger?
Their SA:V ratio decreases, meaning diffusion becomes too slow to meet the cell’s needs.
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Why is a high SA:V ratio important?
Allows efficient exchange of materials in and out of the cell.
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How do organelles solve the problem of SA:V ratio decreasing?
Dividing the cell into smaller, specialised compartments, each with its own high SA:V ratio internally.
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