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What is Surface Area (SA)?
Total area of a cell’s outer membrane where materials enter or exit.
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What is Volume (V)?
Space inside the cell, where metabolism occurs and substances are used or produced.
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What does the SA:V ratio compare?
It compares how much surface area a cell has relative to its volume.
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What happens to the SA:V ratio as a cell gets bigger?
The SA:V ratio decreases as volume increases faster than surface area.= this means there is less surface area available per unit of volume to exchange materials like oxygen, nutrients, waste
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Why is a high SA:V ratio important?
Allows materials to move in and out of the cell quickly and efficiently.
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What does a low SA:V ratio mean for large cells?
It results in slower diffusion, inefficient exchange of materials, and difficulty maintaining homeostasis.
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Why do cells need to be small?
To maintain a high SA:V ratio for efficient exchange of substances.
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What happens if a cell grows too large?
The SA:V ratio becomes too small, leading to insufficient support for the cell's needs.
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How does a larger SA:V ratio affect transport efficiency?
It provides more membrane surface per unit of volume for faster and more efficient exchange.
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What substances are exchanged efficiently with a high SA:V ratio?
Waste products, water, ions, nutrients (like glucose, oxygen).
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What happens to cells when they grow too large?
They can’t survive due to lack of oxygen and nutrients, and waste buildup.
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Why do cells divide when they grow too large?
To restore a higher SA:V ratio and maintain function.
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What is Surface Area (SA)?
Total area of a cell’s outer membrane where materials enter or exit.
What is Volume (V)?
Space inside the cell, where metabolism occurs and substances are used or produced.
What does the SA:V ratio compare?
It compares how much surface area a cell has relative to its volume.
What happens to the SA:V ratio as a cell gets bigger?
The SA:V ratio decreases as volume increases faster than surface area.= this means there is less surface area available per unit of volume to exchange materials like oxygen, nutrients, waste
Why is a high SA:V ratio important?
Allows materials to move in and out of the cell quickly and efficiently.
What does a low SA:V ratio mean for large cells?
It results in slower diffusion, inefficient exchange of materials, and difficulty maintaining homeostasis.
Why do cells need to be small?
To maintain a high SA:V ratio for efficient exchange of substances.
What happens if a cell grows too large?
The SA:V ratio becomes too small, leading to insufficient support for the cell's needs.
How does a larger SA:V ratio affect transport efficiency?
It provides more membrane surface per unit of volume for faster and more efficient exchange.
What substances are exchanged efficiently with a high SA:V ratio?
Waste products, water, ions, nutrients (like glucose, oxygen).
What happens to cells when they grow too large?
They can’t survive due to lack of oxygen and nutrients, and waste buildup.
Why do cells divide when they grow too large?
To restore a higher SA:V ratio and maintain function.
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