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5 Cards in this Set

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Volume Factors

- when a cell increases in size, so does its' chemical activity


- this means that more substances need to be taken in and more need to be removed


- affects the rate at which material are made or used within the cell


- chemical activity per unit of time

Surface Area Factors

- surface area affects the rate at which particles can enter and exit the cell


- the amount of substances that it takes up from the environment and excretes into the environment

Volume to Surface Area Relationship

- as the volume increases, so does the surface area but not to the same extent


- when cell gets bigger, its surface area to volume ratio gets smaller

Example of Volume to Surface Area Ratio

Cube One:


- Surface Area: 6 sides x 1^2 = 6cm^2


- Volume: 1^3 = 1cm^3


- Ratio: 6:1




Cube Two:


- Surface Area: 6 sides x 3^2 = 54cm^2


- Volume: 3^3 = 27 cm^3


- Ratio: 2:1




Cube Three:


- Surface Area: 6 sides x 4^2 = 96 cm^2


- Volume: 4^3 = 64 cm^3


- Ratio: 1.5: 1

Example Explanation:

- the cube with the largest surface area and volume has the smallest surface area to volume ratio


- if the surface area gets too small, then substances won't be able to enter the cell fast enough to fuel the reactions and waste products will start to accumulate