Cell Size

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7 Terms

1
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Cellular metabolism…

depends on size

2
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What must happen for a cell to remain functioning?

  • Cellular waste must leave

  • Dissipate thermal energy

  • Nutrients and other resources/chemical resources must enter

3
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At a certain size…

it becomes too difficult for a cell to regulate what comes in and what goes out of the plasma membrane

4
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The size of a cell…

will dictate the function

5
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What does a cell need to optimize the exchange of material through the plasma membrane?

Needs a high surface area to volume ratio

6
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What does the SA:V ratio mean for the cell?

Cells tend to be small

  • Small cells have a high SA:V ratio 

→ Optimizes exchange of materials at the plasma membrane

7
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Larger cells have a…

lower SA:V ratio

  • Lose efficency exchanging materials

→ The cellular demand for resources increases

→ Rate of heat exchange decreases