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9 Cards in this Set
- Front
- Back
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Name the two main reasons why cells divide instead of continuing to grow?
1 2 |
1. too much of a demand on the DNA
2. too much trouble moving nutrients and waste across the cell membrane |
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As a cell increases in size, it usually does not make extra copies of ________.
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DNA
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The rate of exchange of food and waste in a cell depends on the ________ _____ of the cell.
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surface area
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The rate at which food is used up and waste is produced depends on the cell's ____.
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volume
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Given the following formulas for surface area and volume
SA = l x w x 6 V= l x w x h why would cell growth present a problem? |
The dimensions for surface area have a constant value (6) which does not change with size; however, the dimensions for volume all change with size.
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The process by which a cell divides into two new daughter cells is called ________.
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cell division
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How does cell division solve the problem of cell growth?
1 2 |
1. the DNA is duplicated
2. an increase ratio in surface area to volume |
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Using the formulas for surface area and volume, calculate the ratio of surface area to volume for a cubic measuring 8cm on each side.
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Surface area: 384 cm
Volume: 512 cm Ratio: 384/512 = 12:17 |
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Why would it be more difficult for a cell to move food/nutrients in and waste out if it continued to grow?
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Because the volume would increase faster than the surface area.
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