Term
| Importance of SA/Vol ratio in relationship to the efficiency of cell transport |
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Definition
| Larger size puts larger demand on the DNA (info shortage) and larger cells are less efficient at moving materials in and out of cell (exchanging materials) |
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Term
| How structure of certain cells effects efficiency of cell |
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Definition
| All cell types are structured to maximize their surface area to volume ratio (ex. nerve cells have dendrites and the axon for a large surface area but it is very thin for low volume) |
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Term
| Cell membrane and surface area relationship |
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Definition
| The surface area of the cell membrane determines the rate of exchanging materials in and out of cells |
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Term
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Definition
Vol increases faster than SA, so not enough nutrients can come through membrane to feed the whole cell. Wastes wouldn’t be released fast enough. THEREFORE, smaller size allows for efficient movement in out and throughout the cell.
Diffusion speed is constant – but the time it takes to reach all parts of cell will vary depending on size/shape of cell |
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Term
| Factors that limit cell size |
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Definition
| Info shortages and exchange of materials |
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